diff --git a/apps/web/src/app/invite/[id]/_components/InviteClient.tsx b/apps/web/src/app/invite/[id]/_components/InviteClient.tsx
index d889750d..b9be1e69 100644
--- a/apps/web/src/app/invite/[id]/_components/InviteClient.tsx
+++ b/apps/web/src/app/invite/[id]/_components/InviteClient.tsx
@@ -69,6 +69,15 @@ function InviteClient({ tournamentId, inviteCode }: InviteClientProps) {
           return;
         }
 
+        /**
+         * 이미 참여한 유저(멤버·게스트 공통)가 같은 링크로 재진입하면 join 플로우를 건너뛰고
+         * 토너먼트로 바로 진입. preview 응답의 joined 로 판별 — 별도 조회 없이 preview 한 번으로 끝난다.
+         */
+        if (preview.joined) {
+          router.replace(ROUTES.TOURNAMENT_CREATE(tournamentId));
+          return;
+        }
+
         const user = await getMe().catch(() => null);
         if (user?.identityType === 'MEMBER') {
           await joinAsMemberAndGoToCreate();
diff --git a/apps/web/src/app/tournament/join/_types/join.ts b/apps/web/src/app/tournament/join/_types/join.ts
index 1673c672..b32ebe75 100644
--- a/apps/web/src/app/tournament/join/_types/join.ts
+++ b/apps/web/src/app/tournament/join/_types/join.ts
@@ -4,6 +4,8 @@ export type GetInvitePreviewResponseT = {
   tournamentName: string;
   itemCount: number;
   participantCount: number;
+  /** 요청자(게스트/회원)가 이미 이 토너먼트에 참여 중인지. 미인증·미참여면 false */
+  joined: boolean;
 };
 
 export type PostJoinRequestT = {