diff --git a/frontend/src/components/chatRoomInfo/ChatRoomInfo.tsx b/frontend/src/components/chatRoomInfo/ChatRoomInfo.tsx
index 70dcdaa..a4234d5 100644
--- a/frontend/src/components/chatRoomInfo/ChatRoomInfo.tsx
+++ b/frontend/src/components/chatRoomInfo/ChatRoomInfo.tsx
@@ -5,11 +5,14 @@ import RoomName from './RoomName';
 import RoomMember from './RoomMember';
 import { useRoomInfoStore } from '../../stores/useRoomInfoStore';
 import { listDataProps } from '../../interface/UserListInterface';
+import { UserInfoStore } from '../../stores/UserInfoStore';
 
 const ChatRoomInfo = ({ roomName }: listDataProps) => {
-	const { setRoomInfo, owner } = useRoomInfoStore();
+	const { setRoomInfo, owner, fetchInitialRoomIn, setFetchInitialRoomIn } = useRoomInfoStore();
 	const { chatroom_id } = useParams();
 	const [refreshIntervalId, setRefreshIntervalId] = useState<number>();
+	const userInfo = UserInfoStore();
+	const userId = userInfo.username;
 
 	useEffect(() => {
 		fetchRoomInfo();
@@ -20,6 +23,33 @@ const ChatRoomInfo = ({ roomName }: listDataProps) => {
 		return () => clearInterval(intervalId);
 	}, [chatroom_id, owner]);
 
+	useEffect(() => {
+		if (fetchInitialRoomIn) {
+			fetchRoomIn();
+			console.log('ChatRoom 입장');
+			setFetchInitialRoomIn(false);
+			console.log('ChatRoom 입장 API 1회 호출');
+			fetchRoomInfo();
+		} else {
+			console.log('ChatRoom 입장 API 호출 불가능');
+		}
+	}, []);
+
+	const fetchRoomIn = async () => {
+		try {
+			const apiUrl = `http://localhost:8002/chatroom-service/room-in/${chatroom_id}`;
+			fetch(apiUrl, {
+				method: 'POST',
+				body: JSON.stringify(userId),
+				headers: {
+					'Content-Type': 'application/json',
+				},
+			});
+		} catch (error) {
+			console.error('Error fetching room in:', error);
+		}
+	};
+
 	const fetchRoomInfo = async () => {
 		try {
 			const response = await fetch(`http://localhost:8002/chatroom-service/rooms/${chatroom_id}/roomInformation`, {
diff --git a/frontend/src/stores/useRoomInfoStore.ts b/frontend/src/stores/useRoomInfoStore.ts
index 6c94cd7..0e4fc30 100644
--- a/frontend/src/stores/useRoomInfoStore.ts
+++ b/frontend/src/stores/useRoomInfoStore.ts
@@ -5,10 +5,12 @@ interface RoomInfoState {
 	participation: number;
 	owner: string;
 	kicked: boolean;
+	fetchInitialRoomIn: boolean;
 	chatMemberResponses: { username: string }[];
 	setRoomInfo: (info: Partial<RoomInfoState>) => void;
 	setOwner: (owner: string) => void;
 	setKicked: (kicked: boolean) => void;
+	setFetchInitialRoomIn: (fetchInitialRoomIn: boolean) => void;
 	setChatMemberResponses: (responses: { username: string }[]) => void;
 }
 
@@ -17,9 +19,11 @@ export const useRoomInfoStore = create<RoomInfoState>((set) => ({
 	participation: 0,
 	owner: '',
 	kicked: false,
+	fetchInitialRoomIn: true,
 	chatMemberResponses: [],
 	setRoomInfo: (info) => set((state) => ({ ...state, ...info })),
 	setOwner: (owner) => set({ owner }),
 	setKicked: (kicked) => set({ kicked }),
+	setFetchInitialRoomIn: (fetchInitialRoomIn) => set({ fetchInitialRoomIn }),
 	setChatMemberResponses: (responses) => set({ chatMemberResponses: responses }),
 }));