diff --git a/apps/server/src/network/SocketManager.ts b/apps/server/src/network/SocketManager.ts
index 6ab7ad5..71bdb3c 100644
--- a/apps/server/src/network/SocketManager.ts
+++ b/apps/server/src/network/SocketManager.ts
@@ -1,9 +1,7 @@
-import { Server, Socket } from "socket.io";
+import { Server } from "socket.io";
 import { GameManager } from "@server/domains/game/GameManager";
 import { RoomManager } from "@server/domains/room/RoomManager";
-import { protocol } from "@repo/shared";
-import { registerRoomHandlers, handleRoomDisconnect } from "./handlers/RoomHandler";
-import { registerGameHandlers, handleGameDisconnect } from "./handlers/GameHandler";
+import { registerConnectionHandlers } from "./handlers/registerConnectionHandlers";
 
 export class SocketManager {
   private io: Server;
@@ -17,22 +15,10 @@
   }
 
   public initialize() {
-    this.io.on(protocol.SocketEvents.CONNECT, (socket: Socket) => {
-      console.log(`✅ User connected: ${socket.id}`);
-
-      registerRoomHandlers(this.io, socket, this.roomManager);
-      registerGameHandlers(this.io, socket, this.gameManager, this.roomManager);
-
-      socket.on(protocol.SocketEvents.DISCONNECT, () => {
-        console.log(`❌ User disconnected: ${socket.id}`);
-        
-        // 順番を厳守して実行
-        // 1. まずゲーム世界から消す（データ参照ができなくなる前に実行）
-        handleGameDisconnect(this.io, this.gameManager, socket.id);
-
-        // 2. 次にルームの枠組みから消す（オーナー移譲などのロジックを最後に実行）
-        handleRoomDisconnect(this.io, socket, this.roomManager);
-      });
+    registerConnectionHandlers({
+      io: this.io,
+      gameManager: this.gameManager,
+      roomManager: this.roomManager,
     });
   }
 }
\ No newline at end of file
diff --git a/apps/server/src/network/handlers/registerConnectionHandlers.ts b/apps/server/src/network/handlers/registerConnectionHandlers.ts
new file mode 100644
index 0000000..e75f3c6
--- /dev/null
+++ b/apps/server/src/network/handlers/registerConnectionHandlers.ts
@@ -0,0 +1,41 @@
+import { Server, Socket } from "socket.io";
+import { GameManager } from "@server/domains/game/GameManager";
+import { RoomManager } from "@server/domains/room/RoomManager";
+import { protocol } from "@repo/shared";
+import { registerRoomHandlers, handleRoomDisconnect } from "./RoomHandler";
+import { registerGameHandlers, handleGameDisconnect } from "./GameHandler";
+import { logEvent } from "@server/logging/logEvent";
+
+type RegisterConnectionHandlersParams = {
+  io: Server;
+  gameManager: GameManager;
+  roomManager: RoomManager;
+};
+
+export const registerConnectionHandlers = ({
+  io,
+  gameManager,
+  roomManager,
+}: RegisterConnectionHandlersParams) => {
+  io.on(protocol.SocketEvents.CONNECT, (socket: Socket) => {
+    logEvent("Network", {
+      event: "CONNECT",
+      result: "connected",
+      socketId: socket.id,
+    });
+
+    registerRoomHandlers(io, socket, roomManager);
+    registerGameHandlers(io, socket, gameManager, roomManager);
+
+    socket.on(protocol.SocketEvents.DISCONNECT, () => {
+      logEvent("Network", {
+        event: "DISCONNECT",
+        result: "disconnected",
+        socketId: socket.id,
+      });
+
+      handleGameDisconnect(io, gameManager, socket.id);
+      handleRoomDisconnect(io, socket, roomManager);
+    });
+  });
+};