diff --git a/apps/client/src/app.tsx b/apps/client/src/app.tsx
index a7954dd..cbc7aad 100644
--- a/apps/client/src/app.tsx
+++ b/apps/client/src/app.tsx
@@ -6,18 +6,18 @@
 import { LobbyScene } from "./scenes/lobby/LobbyScene";
 import { GameScene } from "./scenes/game/GameScene";
 
-import { AppState } from "@repo/shared";
+import { ScenePhase } from "@repo/shared";
 
 export default function App() {
-  const { appState, room, myId } = useAppFlow();
+  const { scenePhase, room, myId } = useAppFlow();
 
   // タイトル画面分岐
-  if (appState === AppState.TITLE) {
+  if (scenePhase === ScenePhase.TITLE) {
     return <TitleScene onJoin={(payload) => socketClient.joinRoom(payload)} />;
   }
   
   // ロビー画面分岐
-  if (appState === AppState.LOBBY) {
+  if (scenePhase === ScenePhase.LOBBY) {
     return <LobbyScene room={room} myId={myId} onStart={() => socketClient.startGame()} />;
   }
 
diff --git a/apps/client/src/hooks/useAppFlow.ts b/apps/client/src/hooks/useAppFlow.ts
index f96189e..b0ee7b3 100644
--- a/apps/client/src/hooks/useAppFlow.ts
+++ b/apps/client/src/hooks/useAppFlow.ts
@@ -1,16 +1,16 @@
 import { useEffect, useState } from "react";
 import { socketClient } from "../network/SocketClient";
-import { AppState } from "@repo/shared";
-import type { AppState as AppStateType, Room } from "@repo/shared";
+import { ScenePhase } from "@repo/shared";
+import type { ScenePhase as ScenePhaseType, Room } from "@repo/shared";
 
 type AppFlowState = {
-  appState: AppStateType;
+  scenePhase: ScenePhaseType;
   room: Room | null;
   myId: string | null;
 };
 
 export const useAppFlow = (): AppFlowState => {
-  const [appState, setAppState] = useState<AppStateType>(AppState.TITLE);
+  const [scenePhase, setScenePhase] = useState<ScenePhaseType>(ScenePhase.TITLE);
   const [room, setRoom] = useState<Room | null>(null);
   const [myId, setMyId] = useState<string | null>(null);
 
@@ -18,10 +18,10 @@
     socketClient.onConnect((id) => setMyId(id));
     socketClient.onRoomUpdate((updatedRoom) => {
       setRoom(updatedRoom);
-      setAppState(AppState.LOBBY);
+      setScenePhase(ScenePhase.LOBBY);
     });
-    socketClient.onGameStart(() => setAppState(AppState.PLAYING));
+    socketClient.onGameStart(() => setScenePhase(ScenePhase.PLAYING));
   }, []);
 
-  return { appState, room, myId };
+  return { scenePhase, room, myId };
 };
diff --git a/apps/server/src/domains/game/GameHandler.ts b/apps/server/src/domains/game/GameHandler.ts
index 98a7f8f..c1d5980 100644
--- a/apps/server/src/domains/game/GameHandler.ts
+++ b/apps/server/src/domains/game/GameHandler.ts
@@ -1,7 +1,7 @@
 import { Server, Socket } from "socket.io";
 import { GameManager } from "./GameManager";
 import { RoomManager } from "../room/RoomManager";
-import { protocol, RoomStatus } from "@repo/shared";
+import { protocol, RoomPhase } from "@repo/shared";
 import type { playerTypes } from "@repo/shared";
 
 export const registerGameHandlers = (io: Server, socket: Socket, gameManager: GameManager, roomManager: RoomManager) => {
@@ -19,7 +19,7 @@
       return;
     }
 
-    if (room.status === RoomStatus.PLAYING) {
+    if (room.status === RoomPhase.PLAYING) {
       console.log("[GameHandler] START_GAME ignored (already playing)", { roomId: room.roomId });
       return;
     }
@@ -31,7 +31,7 @@
     });
 
     if (room) {
-      room.status = RoomStatus.PLAYING;
+      room.status = RoomPhase.PLAYING;
 
       const playerIds = room.players.map((p: { id: string }) => p.id);
       
@@ -60,7 +60,7 @@
           // 3分経過時に GameLoop から呼ばれる処理
           console.log(`[GameHandler] ルーム ${room.roomId} のゲームが終了しました (3分経過)`);
           io.to(room.roomId).emit(protocol.SocketEvents.GAME_END); // クライアントへ終了通知
-          room.status = RoomStatus.WAITING; // ルーム状態を待機に戻す
+          room.status = RoomPhase.WAITING; // ルーム状態を待機に戻す
         }
       );
         
diff --git a/apps/server/src/domains/room/RoomManager.ts b/apps/server/src/domains/room/RoomManager.ts
index efe0b7b..cfe8358 100644
--- a/apps/server/src/domains/room/RoomManager.ts
+++ b/apps/server/src/domains/room/RoomManager.ts
@@ -1,4 +1,4 @@
-import { RoomStatus, config } from "@repo/shared";
+import { RoomPhase, config } from "@repo/shared";
 import type { Room, RoomMember } from "@repo/shared";
 
 export class RoomManager {
@@ -12,7 +12,7 @@
         roomId: roomId,
         ownerId: socketId,
         players: [],
-        status: RoomStatus.WAITING,
+        status: RoomPhase.WAITING,
         maxPlayers: config.GAME_CONFIG.MAX_PLAYERS_PER_ROOM
       };
       this.rooms.set(roomId, room);
diff --git a/packages/shared/src/domains/app/app.const.ts b/packages/shared/src/domains/app/app.const.ts
new file mode 100644
index 0000000..f8beb8d
--- /dev/null
+++ b/packages/shared/src/domains/app/app.const.ts
@@ -0,0 +1,9 @@
+import type { ScenePhase as ScenePhaseType } from "./app.type";
+
+// クライアント画面遷移利用フェーズの値
+export const ScenePhase = {
+  TITLE: "title",
+  LOBBY: "lobby",
+  PLAYING: "playing",
+  RESULT: "result",
+} as const satisfies Record<string, ScenePhaseType>;
diff --git a/packages/shared/src/domains/app/app.type.ts b/packages/shared/src/domains/app/app.type.ts
new file mode 100644
index 0000000..83777d0
--- /dev/null
+++ b/packages/shared/src/domains/app/app.type.ts
@@ -0,0 +1,2 @@
+// クライアント画面遷移利用フェーズ型
+export type ScenePhase = "title" | "lobby" | "playing" | "result";
diff --git a/packages/shared/src/domains/room/room.const.ts b/packages/shared/src/domains/room/room.const.ts
index 235dcd1..bf0f189 100644
--- a/packages/shared/src/domains/room/room.const.ts
+++ b/packages/shared/src/domains/room/room.const.ts
@@ -1,15 +1,8 @@
-import type { AppState as AppStateType, RoomStatus as RoomStatusType } from "./room.type";
-
-// クライアント画面遷移利用アプリ状態の値
-export const AppState = {
-  TITLE: "title",
-  LOBBY: "lobby",
-  PLAYING: "playing",
-} as const satisfies Record<string, AppStateType>;
+import type { RoomPhase as RoomPhaseType } from "./room.type";
 
 // ルーム進行フェーズ状態の値
-export const RoomStatus = {
+export const RoomPhase = {
   WAITING: "waiting",
   PLAYING: "playing",
   RESULT: "result",
-} as const satisfies Record<string, RoomStatusType>;
+} as const satisfies Record<string, RoomPhaseType>;
diff --git a/packages/shared/src/domains/room/room.type.ts b/packages/shared/src/domains/room/room.type.ts
index 12ed833..4c1ac67 100644
--- a/packages/shared/src/domains/room/room.type.ts
+++ b/packages/shared/src/domains/room/room.type.ts
@@ -1,8 +1,5 @@
-// クライアント画面遷移利用アプリ状態型
-export type AppState = "title" | "lobby" | "playing";
-
 // ルーム進行フェーズ状態型
-export type RoomStatus = "waiting" | "playing" | "result";
+export type RoomPhase = "waiting" | "playing" | "result";
 
 // ルーム所属プレイヤー情報型
 export interface RoomMember {
@@ -17,7 +14,7 @@
   roomId: string;
   ownerId: string;
   players: RoomMember[];
-  status: RoomStatus;
+  status: RoomPhase;
   maxPlayers: number;
 }
 
diff --git a/packages/shared/src/index.ts b/packages/shared/src/index.ts
index 409abe2..0464d77 100644
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@@ -2,14 +2,16 @@
 export * as gridMapTypes from "./domains/gridMap/gridMap.type";
 export * as gridMapLogic from "./domains/gridMap/gridMap.logic";
 export * as playerTypes from "./domains/player/player.type";
+export * as appTypes from "./domains/app/app.type";
 export * as roomTypes from "./domains/room/room.type";
-export { AppState, RoomStatus } from "./domains/room/room.const";
+export { ScenePhase } from "./domains/app/app.const";
+export { RoomPhase } from "./domains/room/room.const";
 export type {
-	AppState as AppStateType,
-	RoomStatus as RoomStatusType,
+	RoomPhase as RoomPhaseType,
 	Room,
 	RoomMember,
 	JoinRoomPayload,
 } from "./domains/room/room.type";
+export type { ScenePhase as ScenePhaseType } from "./domains/app/app.type";
 export * as protocol from "./protocol/events";
 export * as config from "./config";
\ No newline at end of file