diff --git a/Assets/Scripts/Building.cs b/Assets/Scripts/Building.cs
index c1b206e..dcc4ea2 100644
--- a/Assets/Scripts/Building.cs
+++ b/Assets/Scripts/Building.cs
@@ -200,6 +200,8 @@ namespace Northbound
 
         public TeamType GetTeam() => _team.Value;
 
+        public bool IsDead() => _currentHealth.Value <= 0;
+
         public void SetTeam(TeamType team)
         {
             if (!IsServer) return;
diff --git a/Assets/Scripts/Core.cs b/Assets/Scripts/Core.cs
index e5bc493..f0e0f94 100644
--- a/Assets/Scripts/Core.cs
+++ b/Assets/Scripts/Core.cs
@@ -70,6 +70,8 @@ namespace Northbound
 
         #region ITeamMember Implementation
 
+        public bool IsDead() => _currentHealth.Value <= 0;
+
         public TeamType GetTeam()
         {
             return TeamType.Player; // 코어는 플레이어 팀
diff --git a/Assets/Scripts/EnemyAIController.cs b/Assets/Scripts/EnemyAIController.cs
index 13e1b04..5b0c62f 100644
--- a/Assets/Scripts/EnemyAIController.cs
+++ b/Assets/Scripts/EnemyAIController.cs
@@ -219,6 +219,14 @@ namespace Northbound
                 return;
             }
 
+            // 타겟이 사망했는지 확인
+            IDamageable damageable = targetPlayer.GetComponentInParent<IDamageable>();
+            if (damageable != null && damageable.IsDead())
+            {
+                OnLostTarget();
+                return;
+            }
+
             float distanceToPlayer = Vector3.Distance(transform.position, targetPlayer.transform.position);
             Vector3 chaseReferencePoint = (aiType == TeamType.Monster) ? _chaseStartPosition : _originPosition;
             float distanceFromReference = Vector3.Distance(transform.position, chaseReferencePoint);
@@ -251,6 +259,14 @@ namespace Northbound
                 return;
             }
 
+            // 타겟이 사망했는지 확인
+            IDamageable damageable = target.GetComponentInParent<IDamageable>();
+            if (damageable != null && damageable.IsDead())
+            {
+                OnLostTarget();
+                return;
+            }
+
             // 핵심: ClosestPoint를 사용해 '벽 표면'까지의 실제 거리 계산
             float distance = GetDistanceToTarget(target);
 
@@ -312,6 +328,9 @@ namespace Northbound
                 IDamageable damageable = col.GetComponentInParent<IDamageable>();
                 if (damageable == null) continue;
 
+                // 이미 사망한 타겟은 제외
+                if (damageable.IsDead()) continue;
+
                 ITeamMember teamMember = col.GetComponentInParent<ITeamMember>();
                 bool isAttackable = (teamMember != null && teamMember.GetTeam() == TeamType.Player) || (teamMember == null);
                 if (!isAttackable) continue;
@@ -371,7 +390,17 @@ namespace Northbound
         private GameObject GetTargetPlayer()
         {
             // 1순위: 물리적 참조 (장애물/서버 전용)
-            if (_cachedTargetPlayer != null && _cachedTargetPlayer.activeInHierarchy) return _cachedTargetPlayer;
+            if (_cachedTargetPlayer != null && _cachedTargetPlayer.activeInHierarchy)
+            {
+                // 사망 상태 체크
+                IDamageable damageable = _cachedTargetPlayer.GetComponentInParent<IDamageable>();
+                if (damageable == null || damageable.IsDead())
+                {
+                    ClearTargetPlayer();
+                    return null;
+                }
+                return _cachedTargetPlayer;
+            }
 
             // 2순위: 네트워크 ID 검색
             if (_targetPlayerId.Value != 0)
@@ -379,6 +408,13 @@ namespace Northbound
                 if (NetworkManager.Singleton.SpawnManager.SpawnedObjects.TryGetValue(_targetPlayerId.Value, out NetworkObject networkObject))
                 {
                     _cachedTargetPlayer = networkObject.gameObject;
+                    // 사망 상태 체크
+                    IDamageable damageable = _cachedTargetPlayer.GetComponentInParent<IDamageable>();
+                    if (damageable != null && damageable.IsDead())
+                    {
+                        ClearTargetPlayer();
+                        return null;
+                    }
                     return _cachedTargetPlayer;
                 }
             }
diff --git a/Assets/Scripts/EnemyPortal.cs b/Assets/Scripts/EnemyPortal.cs
index 8bbc00e..ad46a08 100644
--- a/Assets/Scripts/EnemyPortal.cs
+++ b/Assets/Scripts/EnemyPortal.cs
@@ -199,9 +199,11 @@ using UnityEngine;
         currentCost *= (1f + costIncreaseRate / 100f);
     }
 
-    #region ITeamMember Implementation
+        #region ITeamMember Implementation
 
-    public TeamType GetTeam() => _team.Value;
+        public bool IsDead() => _currentHealth.Value <= 0;
+
+        public TeamType GetTeam() => _team.Value;
 
     public void SetTeam(TeamType team)
     {
diff --git a/Assets/Scripts/EnemyUnit.cs b/Assets/Scripts/EnemyUnit.cs
index 9edb060..5af8285 100644
--- a/Assets/Scripts/EnemyUnit.cs
+++ b/Assets/Scripts/EnemyUnit.cs
@@ -132,6 +132,8 @@ namespace Northbound
 
         #region ITeamMember Implementation
 
+        public bool IsDead() => _currentHealth.Value <= 0;
+
         public TeamType GetTeam() => _team.Value;
 
         public void SetTeam(TeamType team)
diff --git a/Assets/Scripts/IDamageable.cs b/Assets/Scripts/IDamageable.cs
index 17ca17f..27d32a8 100644
--- a/Assets/Scripts/IDamageable.cs
+++ b/Assets/Scripts/IDamageable.cs
@@ -6,5 +6,6 @@ namespace Northbound
     public interface IDamageable
     {
         void TakeDamage(int damage, ulong attackerId);
+        bool IsDead();
     }
 }
\ No newline at end of file