diff --git a/backend/src/main/java/io/f1/backend/domain/game/dto/response/PlayerListResponse.java b/backend/src/main/java/io/f1/backend/domain/game/dto/response/PlayerListResponse.java
index df09741c..97889ab1 100644
--- a/backend/src/main/java/io/f1/backend/domain/game/dto/response/PlayerListResponse.java
+++ b/backend/src/main/java/io/f1/backend/domain/game/dto/response/PlayerListResponse.java
@@ -2,4 +2,4 @@
 
 import java.util.List;
 
-public record PlayerListResponse(String host, List<PlayerResponse> players) {}
+public record PlayerListResponse(String host, List<PlayerResponse> players, int currentUserCount) {}
diff --git a/backend/src/main/java/io/f1/backend/domain/game/dto/response/RoomSettingResponse.java b/backend/src/main/java/io/f1/backend/domain/game/dto/response/RoomSettingResponse.java
index 019aeff7..92cd7cbf 100644
--- a/backend/src/main/java/io/f1/backend/domain/game/dto/response/RoomSettingResponse.java
+++ b/backend/src/main/java/io/f1/backend/domain/game/dto/response/RoomSettingResponse.java
@@ -1,4 +1,3 @@
 package io.f1.backend.domain.game.dto.response;
 
-public record RoomSettingResponse(
-        String roomName, int maxUserCount, int currentUserCount, boolean locked) {}
+public record RoomSettingResponse(String roomName, int maxUserCount, boolean locked) {}
diff --git a/backend/src/main/java/io/f1/backend/domain/game/mapper/RoomMapper.java b/backend/src/main/java/io/f1/backend/domain/game/mapper/RoomMapper.java
index 1731385b..cb662875 100644
--- a/backend/src/main/java/io/f1/backend/domain/game/mapper/RoomMapper.java
+++ b/backend/src/main/java/io/f1/backend/domain/game/mapper/RoomMapper.java
@@ -48,7 +48,6 @@ public static RoomSettingResponse toRoomSettingResponse(Room room) {
         return new RoomSettingResponse(
                 room.getRoomSetting().roomName(),
                 room.getRoomSetting().maxUserCount(),
-                room.getPlayerSessionMap().size(),
                 room.getRoomSetting().locked());
     }
 
@@ -63,7 +62,8 @@ public static PlayerListResponse toPlayerListResponse(Room room) {
                         .map(player -> new PlayerResponse(player.getNickname(), player.isReady()))
                         .toList();
 
-        return new PlayerListResponse(room.getHost().getNickname(), playerResponseList);
+        return new PlayerListResponse(
+                room.getHost().getNickname(), playerResponseList, playerResponseList.size());
     }
 
     public static RoomResponse toRoomResponse(Room room, Quiz quiz) {
diff --git a/backend/src/test/java/io/f1/backend/domain/game/app/RoomServiceTests.java b/backend/src/test/java/io/f1/backend/domain/game/app/RoomServiceTests.java
index 67c26298..80faaf91 100644
--- a/backend/src/test/java/io/f1/backend/domain/game/app/RoomServiceTests.java
+++ b/backend/src/test/java/io/f1/backend/domain/game/app/RoomServiceTests.java
@@ -47,8 +47,6 @@ class RoomServiceTests {
 
     @Mock private RoomRepository roomRepository;
     @Mock private QuizService quizService;
-    @Mock private GameService gameService;
-    @Mock private TimerService timerService;
     @Mock private ApplicationEventPublisher eventPublisher;
     @Mock private MessageSender messageSender;
 
@@ -56,9 +54,7 @@ class RoomServiceTests {
     void setUp() {
         MockitoAnnotations.openMocks(this); // @Mock 어노테이션이 붙은 필드들을 초기화합니다.
 
-        roomService =
-                new RoomService(
-                        timerService, quizService, roomRepository, eventPublisher, messageSender);
+        roomService = new RoomService(quizService, roomRepository, eventPublisher, messageSender);
 
         SecurityContextHolder.clearContext();
     }