diff --git a/apps/client/src/scenes/game/GameManager.ts b/apps/client/src/scenes/game/GameManager.ts
index 9a1b14e..4da0b22 100644
--- a/apps/client/src/scenes/game/GameManager.ts
+++ b/apps/client/src/scenes/game/GameManager.ts
@@ -10,6 +10,7 @@
 import { GameNetworkSync } from "./application/GameNetworkSync";
 import { GameLoop } from "./application/GameLoop";
 import { BombManager } from "./application/BombManager";
+import type { BombUpsertPayload } from "./application/BombManager";
 import type { GamePlayers } from "./application/game.types";
 
 /** ゲームシーンの実行ライフサイクルを管理するマネージャー */
@@ -35,8 +36,17 @@
     return this.timer.getRemainingTime();
   }
 
-  public placeBomb() {
-    this.bombManager?.placeBomb();
+  public placeBomb(): string | null {
+    if (!this.bombManager) return null;
+    return this.bombManager.placeBomb();
+  }
+
+  public upsertBomb(bombId: string, payload: BombUpsertPayload): void {
+    this.bombManager?.upsertBomb(bombId, payload);
+  }
+
+  public removeBomb(bombId: string): void {
+    this.bombManager?.removeBomb(bombId);
   }
   
   // 入力と状態管理
diff --git a/apps/client/src/scenes/game/application/BombManager.ts b/apps/client/src/scenes/game/application/BombManager.ts
index 9ed623a..08a923c 100644
--- a/apps/client/src/scenes/game/application/BombManager.ts
+++ b/apps/client/src/scenes/game/application/BombManager.ts
@@ -12,6 +12,14 @@
 /** 経過時間ミリ秒を返す関数型 */
 export type ElapsedMsProvider = () => number;
 
+/** 爆弾の追加更新に使う入力データ型 */
+export type BombUpsertPayload = {
+  x: number;
+  y: number;
+  radiusGrid: number;
+  explodeAtElapsedMs: number;
+};
+
 type BombManagerOptions = {
   worldContainer: Container;
   players: GamePlayers;
@@ -25,7 +33,8 @@
   private players: GamePlayers;
   private myId: string;
   private getElapsedMs: ElapsedMsProvider;
-  private bombs: BombController[] = [];
+  private bombs = new Map<string, BombController>();
+  private nextLocalBombId = 1;
   private lastBombPlacedElapsedMs = Number.NEGATIVE_INFINITY;
 
   constructor({ worldContainer, players, myId, getElapsedMs }: BombManagerOptions) {
@@ -35,53 +44,72 @@
     this.getElapsedMs = getElapsedMs;
   }
 
-  /** 自プレイヤー位置に爆弾を設置する */
-  public placeBomb(): void {
+  /** 自プレイヤー位置に爆弾を設置し，生成IDを返す */
+  public placeBomb(): string | null {
     const me = this.players[this.myId];
-    if (!me || !(me instanceof LocalPlayerController)) return;
+    if (!me || !(me instanceof LocalPlayerController)) return null;
 
     const elapsedMs = this.getElapsedMs();
     const { BOMB_COOLDOWN_MS, BOMB_FUSE_MS, BOMB_RADIUS_GRID } = config.GAME_CONFIG;
     if (elapsedMs - this.lastBombPlacedElapsedMs < BOMB_COOLDOWN_MS) {
-      return;
+      return null;
     }
 
     const position = me.getPosition();
-    const bomb = new BombController({
+    const payload: BombUpsertPayload = {
       x: position.x,
       y: position.y,
       radiusGrid: BOMB_RADIUS_GRID,
       explodeAtElapsedMs: elapsedMs + BOMB_FUSE_MS,
-    });
+    };
+    const bombId = `local-${this.nextLocalBombId}`;
+    this.nextLocalBombId += 1;
 
-    this.bombs.push(bomb);
-    this.worldContainer.addChild(bomb.getDisplayObject());
+    this.upsertBomb(bombId, payload);
     this.lastBombPlacedElapsedMs = elapsedMs;
+    return bombId;
+  }
+
+  /** 指定IDの爆弾を追加または更新する */
+  public upsertBomb(bombId: string, payload: BombUpsertPayload): void {
+    const current = this.bombs.get(bombId);
+    if (current) {
+      this.worldContainer.removeChild(current.getDisplayObject());
+      current.destroy();
+    }
+
+    const bomb = new BombController(payload);
+    this.bombs.set(bombId, bomb);
+    this.worldContainer.addChild(bomb.getDisplayObject());
+  }
+
+  /** 指定IDの爆弾を削除する */
+  public removeBomb(bombId: string): void {
+    const bomb = this.bombs.get(bombId);
+    if (!bomb) return;
+
+    this.worldContainer.removeChild(bomb.getDisplayObject());
+    bomb.destroy();
+    this.bombs.delete(bombId);
   }
 
   /** 爆弾状態を更新し終了済みを破棄する */
   public tick(): void {
     const elapsedMs = this.getElapsedMs();
 
-    const nextBombs: BombController[] = [];
-    this.bombs.forEach((bomb) => {
+    this.bombs.forEach((bomb, bombId) => {
       bomb.tick(elapsedMs);
 
       if (bomb.isFinished()) {
-        this.worldContainer.removeChild(bomb.getDisplayObject());
-        bomb.destroy();
+        this.removeBomb(bombId);
         return;
       }
-
-      nextBombs.push(bomb);
     });
-
-    this.bombs = nextBombs;
   }
 
   /** 管理中の爆弾をすべて破棄する */
   public destroy(): void {
     this.bombs.forEach((bomb) => bomb.destroy());
-    this.bombs = [];
+    this.bombs.clear();
   }
 }