diff --git a/Assets/Scripts/Skills/Effectors/Projectile.cs b/Assets/Scripts/Skills/Effectors/Projectile.cs
index f96812f..71af439 100644
--- a/Assets/Scripts/Skills/Effectors/Projectile.cs
+++ b/Assets/Scripts/Skills/Effectors/Projectile.cs
@@ -164,6 +164,9 @@ namespace EerieVillage.Skills.Effectors
         {
             if (_hitTargets.Contains(other)) return;
 
+            // PD 지시 2026-05-13 — 투사체끼리 충돌 X·통과 정합 (Projectile 컴포넌트 동족 skip·Wall 판정 이전)
+            if (other.GetComponent<Projectile>() != null) return;
+
             // PD 지시 2026-05-09 후속 방어 — 자기(Player) hit·자기 자신·hit 방어.
             if (other.GetComponent<PlayerController>() != null) return;