diff --git a/projects/ucap-webmessenger-app/src/app/store/messenger/sync/reducers.ts b/projects/ucap-webmessenger-app/src/app/store/messenger/sync/reducers.ts
index 163eb95f..16e24260 100644
--- a/projects/ucap-webmessenger-app/src/app/store/messenger/sync/reducers.ts
+++ b/projects/ucap-webmessenger-app/src/app/store/messenger/sync/reducers.ts
@@ -105,6 +105,11 @@ export const reducer = createReducer(
   on(clearRoomUsers, (state, action) => {
     const roomInfo = state.room.entities[action.roomSeq];
 
+    if (!roomInfo) {
+      // 방에 초대만 되고 대화가 발생하지 않아 방정보가 없을때, 방에서 강퇴된다면 roomInfo 가 없을 수 있다.
+      return { ...state };
+    }
+
     const roomUserList: RoomUserDetailData = {
       ...state.roomUser.entities[action.roomSeq]
     };