diff --git a/app/src/main/java/com/texthip/thip/data/model/rooms/response/RoomsDeleteDailyGreetingResponse.kt b/app/src/main/java/com/texthip/thip/data/model/rooms/response/RoomsDeleteDailyGreetingResponse.kt
new file mode 100644
index 00000000..0eb5a2ba
--- /dev/null
+++ b/app/src/main/java/com/texthip/thip/data/model/rooms/response/RoomsDeleteDailyGreetingResponse.kt
@@ -0,0 +1,8 @@
+package com.texthip.thip.data.model.rooms.response
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class RoomsDeleteDailyGreetingResponse (
+    val roomId: Int,
+)
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/data/repository/RoomsRepository.kt b/app/src/main/java/com/texthip/thip/data/repository/RoomsRepository.kt
index 8f384d35..6dceccaa 100644
--- a/app/src/main/java/com/texthip/thip/data/repository/RoomsRepository.kt
+++ b/app/src/main/java/com/texthip/thip/data/repository/RoomsRepository.kt
@@ -289,6 +289,16 @@ class RoomsRepository @Inject constructor(
         ).handleBaseResponse().getOrThrow()
     }
 
+    suspend fun deleteRoomsDailyGreeting(
+        roomId: Int,
+        attendanceCheckId: Int
+    ) = runCatching {
+        roomsService.deleteRoomsDailyGreeting(
+            roomId = roomId,
+            attendanceCheckId = attendanceCheckId
+        ).handleBaseResponse().getOrThrow()
+    }
+
     suspend fun getRoomsRecordsPin(
         roomId: Int,
         recordId: Int
@@ -298,4 +308,12 @@ class RoomsRepository @Inject constructor(
             recordId = recordId
         ).handleBaseResponse().getOrThrow()
     }
+
+    suspend fun leaveRoom(
+        roomId: Int,
+    ) = runCatching {
+        roomsService.leaveRoom(
+            roomId = roomId,
+        ).handleBaseResponse().getOrThrow()
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/data/service/RoomsService.kt b/app/src/main/java/com/texthip/thip/data/service/RoomsService.kt
index a3684a4f..2c624f0b 100644
--- a/app/src/main/java/com/texthip/thip/data/service/RoomsService.kt
+++ b/app/src/main/java/com/texthip/thip/data/service/RoomsService.kt
@@ -21,6 +21,7 @@ import com.texthip.thip.data.model.rooms.response.RoomsBookPageResponse
 import com.texthip.thip.data.model.rooms.response.RoomsCreateDailyGreetingResponse
 import com.texthip.thip.data.model.rooms.response.RoomsCreateVoteResponse
 import com.texthip.thip.data.model.rooms.response.RoomsDailyGreetingResponse
+import com.texthip.thip.data.model.rooms.response.RoomsDeleteDailyGreetingResponse
 import com.texthip.thip.data.model.rooms.response.RoomsDeleteRecordResponse
 import com.texthip.thip.data.model.rooms.response.RoomsDeleteVoteResponse
 import com.texthip.thip.data.model.rooms.response.RoomsPlayingResponse
@@ -178,9 +179,20 @@ interface RoomsService {
         @Body request: RoomsCreateDailyGreetingRequest
     ): BaseResponse<RoomsCreateDailyGreetingResponse>
 
+    @DELETE("rooms/{roomId}/daily-greeting/{attendanceCheckId}")
+    suspend fun deleteRoomsDailyGreeting(
+        @Path("roomId") roomId: Int,
+        @Path("attendanceCheckId") attendanceCheckId: Int
+    ): BaseResponse<RoomsDeleteDailyGreetingResponse>
+
     @GET("rooms/{roomId}/records/{recordId}/pin")
     suspend fun getRoomsRecordsPin(
         @Path("roomId") roomId: Int,
         @Path("recordId") recordId: Int
     ): BaseResponse<RoomsRecordsPinResponse>
+
+    @DELETE("rooms/{roomId}/leave")
+    suspend fun leaveRoom(
+        @Path("roomId") roomId: Int
+    ): BaseResponse<Unit>
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/feed/screen/FeedCommentScreen.kt b/app/src/main/java/com/texthip/thip/ui/feed/screen/FeedCommentScreen.kt
index c14322f8..d2a682e5 100644
--- a/app/src/main/java/com/texthip/thip/ui/feed/screen/FeedCommentScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/feed/screen/FeedCommentScreen.kt
@@ -41,7 +41,6 @@ import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.res.stringResource
@@ -204,7 +203,6 @@ private fun FeedCommentContent(
     var showDeleteDialog by remember { mutableStateOf(false) }
     var showToast by remember { mutableStateOf(false) }
     var toastMessage by remember { mutableStateOf("") }
-    val context = LocalContext.current
 
     LaunchedEffect(showToast) {
         if (showToast) {
diff --git a/app/src/main/java/com/texthip/thip/ui/group/myroom/component/GroupMySectionHeader.kt b/app/src/main/java/com/texthip/thip/ui/group/myroom/component/GroupMySectionHeader.kt
index 2148e1f1..1b35730d 100644
--- a/app/src/main/java/com/texthip/thip/ui/group/myroom/component/GroupMySectionHeader.kt
+++ b/app/src/main/java/com/texthip/thip/ui/group/myroom/component/GroupMySectionHeader.kt
@@ -28,7 +28,7 @@ fun GroupMySectionHeader(onClick: (() -> Unit)? = null) {
         verticalAlignment = Alignment.CenterVertically
     ) {
         Text(
-            text = stringResource(R.string.my_group),
+            text = stringResource(R.string.my_group_room),
             style = typography.title_b700_s20_h24,
             color = colors.White
         )
diff --git a/app/src/main/java/com/texthip/thip/ui/group/myroom/screen/GroupMyScreen.kt b/app/src/main/java/com/texthip/thip/ui/group/myroom/screen/GroupMyScreen.kt
index 617328d0..26022136 100644
--- a/app/src/main/java/com/texthip/thip/ui/group/myroom/screen/GroupMyScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/group/myroom/screen/GroupMyScreen.kt
@@ -48,6 +48,10 @@ fun GroupMyScreen(
 ) {
     val uiState by viewModel.uiState.collectAsState()
 
+    LaunchedEffect(key1 = Unit) {
+        viewModel.refreshData()
+    }
+
     GroupMyContent(
         uiState = uiState,
         onCardClick = onCardClick,
diff --git a/app/src/main/java/com/texthip/thip/ui/group/room/mock/GroupRoomChatData.kt b/app/src/main/java/com/texthip/thip/ui/group/room/mock/GroupRoomChatData.kt
deleted file mode 100644
index 84b22e23..00000000
--- a/app/src/main/java/com/texthip/thip/ui/group/room/mock/GroupRoomChatData.kt
+++ /dev/null
@@ -1,57 +0,0 @@
-package com.texthip.thip.ui.group.room.mock
-
-import androidx.compose.ui.graphics.painter.Painter
-
-data class GroupRoomChatData(
-    val profileImage: Painter?,
-    val nickname: String,
-    val date: String,
-    val content: String,
-    val isMine: Boolean
-)
-
-val mockMessages = listOf(
-    GroupRoomChatData(
-        null,
-        "user.01",
-        "2024.04.29",
-        "공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다.",
-        isMine = true
-    ),
-    GroupRoomChatData(
-        null,
-        "user.01",
-        "2024.04.28",
-        "공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다.",
-        isMine = true
-    ),
-    GroupRoomChatData(null, "user.01", "2024.04.30", "공백 포함 글자 입력입니다.", isMine = false),
-    GroupRoomChatData(
-        null,
-        "user.01",
-        "2024.04.30",
-        "공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다.",
-        isMine = true
-    ),
-    GroupRoomChatData(
-        null,
-        "user.01",
-        "2024.04.30",
-        "공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다.",
-        isMine = false
-    ),
-    GroupRoomChatData(
-        null,
-        "user.01",
-        "2024.04.27",
-        "공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다.",
-        isMine = true
-    ),
-    GroupRoomChatData(
-        null,
-        "user.01",
-        "2024.04.27",
-        "공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다. 공백 포함 글자 입력입니다.",
-        isMine = true
-    ),
-).sortedByDescending { it.date }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomChatScreen.kt b/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomChatScreen.kt
index f366f0ad..bca30a8c 100644
--- a/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomChatScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomChatScreen.kt
@@ -1,5 +1,6 @@
 package com.texthip.thip.ui.group.room.screen
 
+import android.widget.Toast
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.slideInVertically
@@ -28,6 +29,8 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.blur
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -60,21 +63,52 @@ fun GroupRoomChatScreen(
 ) {
     var inputText by remember { mutableStateOf("") }
     val uiState by viewModel.uiState.collectAsState()
+    val context = LocalContext.current
 
-    var activeToast by remember { mutableStateOf<ToastType?>(null) }
+    var showToast by remember { mutableStateOf(false) }
+    var toastMessage by remember { mutableStateOf("") }
+    val colorWhite = colors.White
+    val colorRed = colors.Red
+    var toastColor by remember { mutableStateOf(colorWhite) }
+
+    val dailyGreetingLimitMessage = stringResource(R.string.group_room_chat_max)
+    val deleteSuccessMessage = stringResource(R.string.group_room_chat_delete_success)
 
     LaunchedEffect(key1 = Unit) {
         viewModel.eventFlow.collectLatest { event ->
             when (event) {
                 is GroupRoomChatEvent.ShowToast -> {
-                    activeToast = event.type
+                    when (event.type) {
+                        ToastType.DAILY_GREETING_LIMIT -> {
+                            toastMessage = dailyGreetingLimitMessage
+                            toastColor = colorRed
+                        }
+                        ToastType.FIRST_WRITE -> {
+                            toastMessage = dailyGreetingLimitMessage
+                            toastColor = colorWhite
+                        }
+                        ToastType.DELETE_GREETING_SUCCESS -> {
+                            toastMessage = deleteSuccessMessage
+                            toastColor = colorWhite
+                        }
+                    }
+                    showToast = true
+                }
+                is GroupRoomChatEvent.ShowErrorToast -> {
+                    Toast.makeText(context, event.message, Toast.LENGTH_SHORT).show()
                 }
-
                 else -> Unit
             }
         }
     }
 
+    LaunchedEffect(showToast) {
+        if (showToast) {
+            delay(3000)
+            showToast = false
+        }
+    }
+
     GroupRoomChatContent(
         uiState = uiState,
         onEvent = viewModel::onEvent,
@@ -85,8 +119,9 @@ fun GroupRoomChatScreen(
             inputText = ""
         },
         onNavigateBack = onBackClick,
-        activeToast = activeToast,
-        onDismissToast = { activeToast = null }
+        showToast = showToast,
+        toastMessage = toastMessage,
+        toastColor = toastColor
     )
 }
 
@@ -98,8 +133,9 @@ fun GroupRoomChatContent(
     onInputTextChanged: (String) -> Unit,
     onSendClick: () -> Unit,
     onNavigateBack: () -> Unit,
-    activeToast: ToastType?,
-    onDismissToast: () -> Unit
+    showToast: Boolean,
+    toastMessage: String,
+    toastColor: Color,
 ) {
     var isBottomSheetVisible by remember { mutableStateOf(false) }
     var selectedMessage by remember { mutableStateOf<TodayCommentList?>(null) }
@@ -240,13 +276,14 @@ fun GroupRoomChatContent(
         }
 
         AnimatedVisibility(
-            visible = activeToast != null,
+            // visible 조건을 showToast로 변경
+            visible = showToast,
             enter = slideInVertically(
-                initialOffsetY = { -it }, // 위에서 아래로
+                initialOffsetY = { -it },
                 animationSpec = tween(durationMillis = 2000)
             ),
             exit = slideOutVertically(
-                targetOffsetY = { -it }, // 위로 사라짐
+                targetOffsetY = { -it },
                 animationSpec = tween(durationMillis = 2000)
             ),
             modifier = Modifier
@@ -254,40 +291,10 @@ fun GroupRoomChatContent(
                 .padding(horizontal = 20.dp, vertical = 16.dp)
                 .zIndex(3f)
         ) {
-            LaunchedEffect(activeToast) {
-                if (activeToast != null) {
-                    delay(3000L)
-                    onDismissToast()
-                }
-            }
-
-            AnimatedVisibility(
-                visible = activeToast != null,
-                enter = slideInVertically(
-                    initialOffsetY = { -it },
-                    animationSpec = tween(durationMillis = 2000)
-                ),
-                exit = slideOutVertically(
-                    targetOffsetY = { -it },
-                    animationSpec = tween(durationMillis = 2000)
-                ),
-                modifier = Modifier
-                    .align(Alignment.TopCenter)
-                    .padding(horizontal = 20.dp, vertical = 16.dp)
-                    .zIndex(3f)
-            ) {
-                when (activeToast) {
-                    ToastType.DAILY_GREETING_LIMIT -> {
-                        ToastWithDate(color = colors.Red)
-                    }
-
-                    ToastType.FIRST_WRITE -> {
-                        ToastWithDate()
-                    }
-
-                    null -> {}
-                }
-            }
+            ToastWithDate(
+                message = toastMessage,
+                color = toastColor
+            )
         }
     }
 
@@ -298,7 +305,9 @@ fun GroupRoomChatContent(
                     text = stringResource(R.string.delete),
                     color = colors.Red,
                     onClick = {
-                        // TODO: 삭제 처리
+                        selectedMessage?.let { message ->
+                            onEvent(GroupRoomChatEvent.DeleteGreeting(message.attendanceCheckId))
+                        }
                         isBottomSheetVisible = false
                     }
                 )
@@ -352,8 +361,9 @@ private fun GroupRoomChatScreenPreview() {
             onInputTextChanged = { newText -> inputText = newText },
             onSendClick = {},
             onNavigateBack = {},
-            activeToast = null,
-            onDismissToast = {}
+            showToast = false,
+            toastMessage = "",
+            toastColor = colors.White
         )
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomScreen.kt b/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomScreen.kt
index d11949e8..bbeb0d64 100644
--- a/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomScreen.kt
+++ b/app/src/main/java/com/texthip/thip/ui/group/room/screen/GroupRoomScreen.kt
@@ -1,5 +1,9 @@
 package com.texthip.thip.ui.group.room.screen
 
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.core.tween
+import androidx.compose.animation.slideInVertically
+import androidx.compose.animation.slideOutVertically
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -28,6 +32,7 @@ import androidx.compose.ui.layout.ContentScale
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.zIndex
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import coil.compose.AsyncImage
@@ -36,15 +41,20 @@ import com.texthip.thip.data.model.rooms.response.CurrentVote
 import com.texthip.thip.data.model.rooms.response.RoomsPlayingResponse
 import com.texthip.thip.ui.common.bottomsheet.MenuBottomSheet
 import com.texthip.thip.ui.common.modal.DialogPopup
+import com.texthip.thip.ui.common.modal.ToastWithDate
 import com.texthip.thip.ui.common.topappbar.GradationTopAppBar
 import com.texthip.thip.ui.group.room.component.GroupRoomBody
 import com.texthip.thip.ui.group.room.component.GroupRoomHeader
 import com.texthip.thip.ui.group.room.mock.MenuBottomSheetItem
+import com.texthip.thip.ui.group.room.viewmodel.GroupRoomEvent
+import com.texthip.thip.ui.group.room.viewmodel.GroupRoomToastType
 import com.texthip.thip.ui.group.room.viewmodel.GroupRoomUiState
 import com.texthip.thip.ui.group.room.viewmodel.GroupRoomViewModel
 import com.texthip.thip.ui.theme.ThipTheme
 import com.texthip.thip.ui.theme.ThipTheme.colors
 import com.texthip.thip.utils.type.GenreBackgroundImage
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.collectLatest
 
 @Composable
 fun GroupRoomScreen(
@@ -57,12 +67,23 @@ fun GroupRoomScreen(
     viewModel: GroupRoomViewModel = hiltViewModel()
 ) {
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
+    var activeToast by remember { mutableStateOf<GroupRoomToastType?>(null) }
 
     // 화면이 처음 그려질 때 데이터 로딩 실행
     LaunchedEffect(key1 = Unit) {
         viewModel.fetchRoomsPlaying(roomId)
     }
 
+    LaunchedEffect(key1 = viewModel.eventFlow) {
+        viewModel.eventFlow.collectLatest { event ->
+            when (event) {
+                is GroupRoomEvent.ShowToast -> {
+                    activeToast = event.type
+                }
+            }
+        }
+    }
+
     // UI 상태에 따라 다른 화면을 보여줌
     when (val state = uiState) {
         is GroupRoomUiState.Loading -> {
@@ -79,7 +100,10 @@ fun GroupRoomScreen(
                 onNavigateToMates = onNavigateToMates,
                 onNavigateToChat = onNavigateToChat,
                 onNavigateToNote = onNavigateToNote,
-                onNavigateToBookDetail = onNavigateToBookDetail
+                onNavigateToBookDetail = onNavigateToBookDetail,
+                onLeaveRoomConfirm = { viewModel.leaveRoom(roomId) },
+                activeToast = activeToast,
+                onDismissToast = { activeToast = null }
             )
         }
 
@@ -100,6 +124,9 @@ fun GroupRoomContent(
     onNavigateToChat: () -> Unit = {},
     onNavigateToNote: (page: Int?, isOverview: Boolean?) -> Unit = { _, _ -> },
     onNavigateToBookDetail: (isbn: String) -> Unit = {},
+    onLeaveRoomConfirm: () -> Unit = {},
+    activeToast: GroupRoomToastType?,
+    onDismissToast: () -> Unit = {}
 ) {
     val scrollState = rememberScrollState()
 
@@ -204,6 +231,47 @@ fun GroupRoomContent(
             isRightIconVisible = true,
             onRightClick = { isBottomSheetVisible = true },
         )
+
+        AnimatedVisibility(
+            visible = activeToast != null,
+            enter = slideInVertically(
+                initialOffsetY = { -it },
+                animationSpec = tween(durationMillis = 2000)
+            ),
+            exit = slideOutVertically(
+                targetOffsetY = { -it },
+                animationSpec = tween(durationMillis = 2000)
+            ),
+            modifier = Modifier
+                .align(Alignment.TopCenter)
+                .padding(horizontal = 20.dp, vertical = 16.dp)
+                .zIndex(3f)
+        ) {
+            LaunchedEffect(activeToast) {
+                if (activeToast != null) {
+                    delay(3000L)
+                    if (activeToast == GroupRoomToastType.LEAVE_ROOM_SUCCESS) {
+                        onBackClick()
+                    }
+                    onDismissToast()
+                }
+            }
+
+            when (activeToast) {
+                GroupRoomToastType.LEAVE_ROOM_SUCCESS -> {
+                    ToastWithDate(message = stringResource(R.string.leave_room_toast))
+                }
+
+                GroupRoomToastType.ACTION_FAILURE -> {
+                    ToastWithDate(
+                        message = stringResource(R.string.leave_room_fail_toast),
+                        color = colors.Red
+                    )
+                }
+
+                null -> {}
+            }
+        }
     }
 
     if (isBottomSheetVisible) {
@@ -248,7 +316,7 @@ fun GroupRoomContent(
                 title = stringResource(R.string.leave_room_modal_title),
                 description = stringResource(R.string.leave_room_modal_content),
                 onConfirm = {
-                    // 방 나가기 로직
+                    onLeaveRoomConfirm()
                     isLeaveDialogVisible = false
                 },
                 onCancel = {
@@ -304,7 +372,8 @@ private fun GroupRoomScreenPreview() {
                 userPercentage = 5,
                 currentVotes = emptyList()
             ),
-            onBackClick = {}
+            onBackClick = {},
+            activeToast = null
         )
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomChatViewModel.kt b/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomChatViewModel.kt
index f8858cea..6df70275 100644
--- a/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomChatViewModel.kt
+++ b/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomChatViewModel.kt
@@ -24,13 +24,15 @@ data class GroupRoomChatUiState(
 
 enum class ToastType {
     DAILY_GREETING_LIMIT,
-    FIRST_WRITE
+    FIRST_WRITE,
+    DELETE_GREETING_SUCCESS
 }
 
 sealed interface GroupRoomChatEvent {
     data object LoadMore : GroupRoomChatEvent
     data class ShowToast(val type: ToastType) : GroupRoomChatEvent
     data class ShowErrorToast(val message: String) : GroupRoomChatEvent
+    data class DeleteGreeting(val attendanceCheckId: Int) : GroupRoomChatEvent
 }
 
 @HiltViewModel
@@ -55,10 +57,25 @@ class GroupRoomChatViewModel @Inject constructor(
     fun onEvent(event: GroupRoomChatEvent) {
         when (event) {
             is GroupRoomChatEvent.LoadMore -> fetchDailyGreetings()
+            is GroupRoomChatEvent.DeleteGreeting -> deleteDailyGreeting(event.attendanceCheckId)
             else -> Unit
         }
     }
 
+    private fun deleteDailyGreeting(attendanceCheckId: Int) {
+        viewModelScope.launch {
+            roomsRepository.deleteRoomsDailyGreeting(
+                roomId = roomId,
+                attendanceCheckId = attendanceCheckId
+            ).onSuccess {
+                _eventFlow.emit(GroupRoomChatEvent.ShowToast(ToastType.DELETE_GREETING_SUCCESS))
+                fetchDailyGreetings(isRefresh = true)
+            }.onFailure { throwable ->
+                _eventFlow.emit(GroupRoomChatEvent.ShowErrorToast(throwable.message ?: "삭제에 실패했습니다."))
+            }
+        }
+    }
+
     private fun fetchDailyGreetings(isRefresh: Boolean = false) {
         val currentState = _uiState.value
         if (currentState.isLoading || currentState.isLoadingMore || (currentState.isLastPage && !isRefresh)) return
diff --git a/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomViewModel.kt b/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomViewModel.kt
index 3fa2d3b3..2d1b2bcf 100644
--- a/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomViewModel.kt
+++ b/app/src/main/java/com/texthip/thip/ui/group/room/viewmodel/GroupRoomViewModel.kt
@@ -1,11 +1,13 @@
 package com.texthip.thip.ui.group.room.viewmodel
 
-import com.texthip.thip.data.model.rooms.response.RoomsPlayingResponse
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
+import com.texthip.thip.data.model.rooms.response.RoomsPlayingResponse
 import com.texthip.thip.data.repository.RoomsRepository
 import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asSharedFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 import javax.inject.Inject
@@ -16,6 +18,15 @@ sealed interface GroupRoomUiState {
     data class Error(val message: String) : GroupRoomUiState // 실패
 }
 
+enum class GroupRoomToastType {
+    LEAVE_ROOM_SUCCESS,
+    ACTION_FAILURE // 방 나가기/삭제 등 실패 시 공통으로 사용
+}
+
+sealed interface GroupRoomEvent {
+    data class ShowToast(val type: GroupRoomToastType) : GroupRoomEvent
+}
+
 @HiltViewModel
 class GroupRoomViewModel @Inject constructor(
     private val roomsRepository: RoomsRepository
@@ -23,6 +34,9 @@ class GroupRoomViewModel @Inject constructor(
     private val _uiState = MutableStateFlow<GroupRoomUiState>(GroupRoomUiState.Loading)
     val uiState = _uiState.asStateFlow()
 
+    private val _eventFlow = MutableSharedFlow<GroupRoomEvent>()
+    val eventFlow = _eventFlow.asSharedFlow()
+
     fun fetchRoomsPlaying(roomId: Int) {
         // ViewModel의 생명주기와 연결된 코루틴 스코프에서 실행
         viewModelScope.launch {
@@ -41,4 +55,16 @@ class GroupRoomViewModel @Inject constructor(
                 }
         }
     }
+
+    fun leaveRoom(roomId: Int) {
+        viewModelScope.launch {
+            roomsRepository.leaveRoom(roomId = roomId)
+                .onSuccess {
+                    _eventFlow.emit(GroupRoomEvent.ShowToast(GroupRoomToastType.LEAVE_ROOM_SUCCESS))
+                }
+                .onFailure { throwable ->
+                    _eventFlow.emit(GroupRoomEvent.ShowToast(GroupRoomToastType.ACTION_FAILURE))
+                }
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 284c340a..2247da17 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -155,7 +155,6 @@
     <string name="group_recruiting">"모집"</string>
     <string name="group_genre">"장르"</string>
     <string name="deadline_string">마감 임박한 독서 모임방</string>
-    <string name="my_group">내 모임방</string>
     <string name="group_participant">%1$s명</string>
     <string name="group_participant_string">참여</string>
     <string name="group_progress">"%1$s님의 진행도 "</string>
@@ -170,6 +169,8 @@
     <string name="card_input_author">%1$s 저</string>
     <string name="current_page">현재 페이지 %d</string>
     <string name="percent">%</string>
+    <string name="leave_room_toast">모임 나가기를 완료했어요.</string>
+    <string name="leave_room_fail_toast">모임 나가기를 실패했어요.</string>
 
     <!--    group room    -->
     <string name="introduction_content">소개글</string>
@@ -195,6 +196,7 @@
     <string name="group_room_no_chat_title">아직 대화가 없어요</string>
     <string name="group_room_no_chat_content">첫번째 한마디를 남겨보세요!</string>
     <string name="group_room_chat_max">오늘의 한마디는 하루에 다섯번까지 작성할 수 있어요</string>
+    <string name="group_room_chat_delete_success">오늘의 한마디 삭제를 완료했어요.</string>
     <string name="numbering" formatted="false">%d. %s</string>
 
     <!--    group note    -->