diff --git a/src/components/game/Lobby.js b/src/components/game/Lobby.js
index 5026b9c..e44816a 100644
--- a/src/components/game/Lobby.js
+++ b/src/components/game/Lobby.js
@@ -555,16 +555,28 @@ const Lobby = () => {
     return res.data;
   }
 
+  //방장 roomcheck
   useEffect(() => {
+    if (roomId === null){
+      return;
+    }
+
+    const fetchRoomName1 = async() => {
+      const response = await apiAxiosInstance.get(`/roomName/${roomId}`)
+      .then(res => {
+        if(res.data === ""){
+          alert('존재하지 않는 방입니다');
+          window.close();
+        }
+      });
+    }
+
     const checkRoom = async () => {
       if (userData != null && userData.user_id != null) {
         const result = await roomCheck(roomId, userData.user_id);
         console.log(result);
-        // if(!result){
-        //   alert("존재하지 않는방");
-        //   window.close();
-        // }
         setRoomchecking(result);
+        fetchRoomName1();
       }
     };
 
diff --git a/src/components/userManagement/AddNewUser.tsx b/src/components/userManagement/AddNewUser.tsx
index b80e58e..29ea30c 100644
--- a/src/components/userManagement/AddNewUser.tsx
+++ b/src/components/userManagement/AddNewUser.tsx
@@ -37,7 +37,8 @@ const AddNewUser: FC = () => {
             jwt : token,
           },
         });
-        location.href = "/lobby/" + response.data;
+        // location.href = "/lobby/" + response.data;
+        window.open("/lobby/" + response.data);
       } catch (error) {
         console.error('Error creating game room:', error);
       }