diff --git a/apps/server/src/domains/game/GameManager.ts b/apps/server/src/domains/game/GameManager.ts
index 62fa6a9..43eee46 100644
--- a/apps/server/src/domains/game/GameManager.ts
+++ b/apps/server/src/domains/game/GameManager.ts
@@ -48,13 +48,6 @@
     this.gameSessionService.startGameLoop(roomId, playerIds, onTick, onGameEnd);
   }
 
-  /**
-   * ゲームループを停止する
-   */
-  stopGameLoop(roomId: string) {
-    this.gameSessionService.stopGameLoop(roomId);
-  }
-
   // 指定ID配列のプレイヤーを取得
   getPlayersByIds(playerIds: string[]) {
     return playerIds
diff --git a/apps/server/src/domains/game/application/services/GameSessionService.ts b/apps/server/src/domains/game/application/services/GameSessionService.ts
index 060331a..48191cf 100644
--- a/apps/server/src/domains/game/application/services/GameSessionService.ts
+++ b/apps/server/src/domains/game/application/services/GameSessionService.ts
@@ -63,25 +63,4 @@
       playerCount: playerIds.length,
     });
   }
-
-  public stopGameLoop(roomId: string) {
-    const loop = this.gameLoops.get(roomId);
-    if (loop) {
-      loop.stop();
-      this.gameLoops.delete(roomId);
-      this.roomStartTimes.delete(roomId);
-      this.mapStores.delete(roomId);
-      logEvent("GameSessionService", {
-        event: "STOP_GAME_LOOP",
-        result: "stopped",
-        roomId,
-      });
-    } else {
-      logEvent("GameSessionService", {
-        event: "STOP_GAME_LOOP",
-        result: "ignored_not_running",
-        roomId,
-      });
-    }
-  }
 }
diff --git a/apps/server/src/network/handlers/registerConnectionHandlers.ts b/apps/server/src/network/handlers/registerConnectionHandlers.ts
index b497f8c..fa871f9 100644
--- a/apps/server/src/network/handlers/registerConnectionHandlers.ts
+++ b/apps/server/src/network/handlers/registerConnectionHandlers.ts
@@ -42,12 +42,9 @@
       });
 
       const roomId = roomManager.getRoomByPlayerId(socket.id)?.roomId;
+
       handleGameDisconnect(io, gameManager, roomId, socket.id);
       handleRoomDisconnect(io, socket, roomManager);
-
-      if (roomId && !roomManager.getRoomById(roomId)) {
-        gameManager.stopGameLoop(roomId);
-      }
     });
   });
 };