diff --git a/apps/server/src/network/SocketManager.ts b/apps/server/src/network/SocketManager.ts
index 725bf2f..552ed96 100644
--- a/apps/server/src/network/SocketManager.ts
+++ b/apps/server/src/network/SocketManager.ts
@@ -1,10 +1,9 @@
 import { Server, Socket } from "socket.io";
 import { GameManager } from "../managers/GameManager.js";
-import { Room, RoomStatus } from "@repo/shared/src/types/room";
+import { Room, RoomStatus, RoomMember, JoinRoomPayload } from "@repo/shared/src/types/room";
 import { SocketEvents } from "@repo/shared/src/protocol/events";
 import { GAME_CONFIG } from "@repo/shared/src/config/gameConfig";
-
-type RoomPlayer = Room["players"][0];
+import type { MovePayload } from "@repo/shared/src/types/payloads";
 
 export class SocketManager {
   private io: Server;
@@ -24,18 +23,15 @@
 
       // ロビー・ルーム関連イベント群
 
-      socket.on(SocketEvents.JOIN_ROOM, (data: { roomId: string; playerName: string }) => {
+      socket.on(SocketEvents.JOIN_ROOM, (data: JoinRoomPayload) => {
         const { roomId, playerName } = data;
         
-        // Socket.io ルーム参加処理
         socket.join(roomId);
 
-        // ルーム未作成時の新規作成分岐
         let room = this.rooms.get(roomId);
         if (!room) {
           room = {
             roomId: roomId,
-            // 先着参加者のオーナー割り当て
             ownerId: socket.id,
             players: [],
             status: RoomStatus.WAITING,
@@ -45,7 +41,7 @@
         }
 
         // 参加プレイヤー情報ルーム追加
-        const newPlayer: RoomPlayer = {
+        const newPlayer: RoomMember = {
           id: socket.id,
           name: playerName,
           isOwner: room.ownerId === socket.id,
@@ -88,7 +84,7 @@
 
       // ゲームプレイ中イベント群
 
-      socket.on(SocketEvents.MOVE, (data: { x: number; y: number }) => {
+      socket.on(SocketEvents.MOVE, (data: MovePayload) => {
         // サーバー側プレイヤー座標更新
         this.gameManager.movePlayer(socket.id, data.x, data.y);
         
diff --git "a/docs/01_Env/ENV_01_\347\222\260\345\242\203\346\247\213\347\257\211\343\203\273\346\212\200\350\241\223\343\202\271\343\202\277\343\203\203\343\202\257.txt" "b/docs/01_Env/ENV_01_\347\222\260\345\242\203\346\247\213\347\257\211\343\203\273\346\212\200\350\241\223\343\202\271\343\202\277\343\203\203\343\202\257.txt"
index 2af0301..2521b83 100644
--- "a/docs/01_Env/ENV_01_\347\222\260\345\242\203\346\247\213\347\257\211\343\203\273\346\212\200\350\241\223\343\202\271\343\202\277\343\203\203\343\202\257.txt"
+++ "b/docs/01_Env/ENV_01_\347\222\260\345\242\203\346\247\213\347\257\211\343\203\273\346\212\200\350\241\223\343\202\271\343\202\277\343\203\203\343\202\257.txt"
@@ -67,7 +67,7 @@
             ├── src/
             │   ├── config/     # 共通定数（gameConfig.ts）
             │   ├── protocol/   # 通信イベント定義（events.ts）
-            │   ├── types/      # 型定義（player.ts, room.ts）
+            │   ├── types/      # 型定義（payloads.ts, player.ts, room.ts）
             │   └── index.ts    # エントリーポイント (tsupビルド対象)
             ├── tsup.config.ts  # ビルド設定
             └── package.json
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 14cb0f9..67ad2b4 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -1,4 +1,6 @@
 // shared パッケージ公開 API
 export * from './config/gameConfig';
 export * from './types/room';
+export * from './types/payloads';
+export * from './types/player';
 export * from "./protocol/events";
\ No newline at end of file
diff --git a/packages/shared/src/types/payloads.ts b/packages/shared/src/types/payloads.ts
new file mode 100644
index 0000000..543ba44
--- /dev/null
+++ b/packages/shared/src/types/payloads.ts
@@ -0,0 +1,5 @@
+// 移動イベント送信ペイロード型
+export interface MovePayload {
+  x: number;
+  y: number;
+}
\ No newline at end of file