diff --git a/src/game/scenes/BattleScene.ts b/src/game/scenes/BattleScene.ts
index a0b6aee..4310a9b 100644
--- a/src/game/scenes/BattleScene.ts
+++ b/src/game/scenes/BattleScene.ts
@@ -1124,7 +1124,7 @@ type MapMenuAction = 'endTurn' | 'threat' | 'save' | 'load' | 'roster' | 'bond'
 type EnemyAiBehavior = 'aggressive' | 'guard' | 'hold';
 type BattleOutcome = 'victory' | 'defeat';
 type SaveSlotMode = 'save' | 'load';
-type TurnPromptMode = 'turn-end' | 'post-move' | 'load-confirm';
+type TurnPromptMode = 'turn-end' | 'post-move' | 'load-confirm' | 'save-overwrite-confirm';
 
 const battleSpeedStorageKey = 'heros-web:battle-speed';
 const battleSpeedLabels: Record<BattleSpeed, string> = {
@@ -11204,8 +11204,7 @@ export class BattleScene extends Phaser.Scene {
           this.suppressNextLeftClick = true;
           soundDirector.playSelect();
           if (mode === 'save') {
-            this.saveBattleState(slot);
-            this.hideSaveSlotPanel();
+            this.showSaveBattleConfirm(slot);
           } else {
             this.showLoadBattleConfirm(slot);
           }
@@ -11242,6 +11241,37 @@ export class BattleScene extends Phaser.Scene {
     this.saveSlotPanelObjects = [];
   }
 
+  private showSaveBattleConfirm(slot: number) {
+    const battleSave = this.readBattleSaveState(slot);
+    const campaignSlot = listCampaignSaveSlots().find((candidate) => candidate.slot === slot);
+    if (!battleSave && !campaignSlot?.exists) {
+      this.saveBattleState(slot);
+      this.hideSaveSlotPanel();
+      return;
+    }
+
+    const existingSummary = battleSave
+      ? `기존 전투: ${this.formatSavedAt(battleSave.savedAt)}`
+      : `기존 캠페인: ${campaignSlot?.progressTitle ?? campaignSlot?.battleTitle ?? '저장 데이터'}`;
+
+    this.hideSaveSlotPanel();
+    this.showTurnEndPrompt(undefined, {
+      mode: 'save-overwrite-confirm',
+      title: '전투 저장 확인',
+      body: `슬롯 ${slot}에 기존 저장이 있습니다.\n${existingSummary}\n덮어쓸까요?`,
+      primaryLabel: '덮어쓰기',
+      secondaryLabel: '취소',
+      primaryAction: () => {
+        this.hideTurnEndPrompt();
+        this.saveBattleState(slot);
+      },
+      secondaryAction: () => {
+        this.hideTurnEndPrompt();
+        this.showSaveSlotPanel('save');
+      }
+    });
+  }
+
   private showLoadBattleConfirm(slot: number) {
     const state = this.readBattleSaveState(slot);
     if (!state) {