diff --git a/backend/app.py b/backend/app.py
index d239d09..86f0f69 100644
--- a/backend/app.py
+++ b/backend/app.py
@@ -2482,19 +2482,25 @@ def api_sales_detail():
         drug_session = db_manager.get_session('PM_DRUG')
         
         # 판매 내역 조회 (최근 N일)
+        # CD_GOODS.BARCODE가 없으면 CD_ITEM_UNIT_MEMBER.CD_CD_BARCODE 사용 (세트상품/자체등록 바코드)
         sales_query = text("""
             SELECT 
                 S.SL_DT_appl as sale_date,
                 S.SL_NO_order as item_order,
                 S.DrugCode as drug_code,
                 ISNULL(G.GoodsName, '알 수 없음') as product_name,
-                ISNULL(G.BARCODE, '') as barcode,
+                COALESCE(NULLIF(G.BARCODE, ''), U.CD_CD_BARCODE, '') as barcode,
                 ISNULL(G.SplName, '') as supplier,
                 ISNULL(S.QUAN, 1) as quantity,
                 ISNULL(S.SL_TOTAL_PRICE, 0) as total_price_db,
                 ISNULL(G.Saleprice, 0) as unit_price
             FROM SALE_SUB S
             LEFT JOIN PM_DRUG.dbo.CD_GOODS G ON S.DrugCode = G.DrugCode
+            OUTER APPLY (
+                SELECT TOP 1 CD_CD_BARCODE 
+                FROM PM_DRUG.dbo.CD_ITEM_UNIT_MEMBER 
+                WHERE DRUGCODE = S.DrugCode AND CD_CD_BARCODE IS NOT NULL AND CD_CD_BARCODE != ''
+            ) U
             WHERE S.SL_DT_appl >= CONVERT(VARCHAR(8), DATEADD(DAY, -:days, GETDATE()), 112)
             ORDER BY S.SL_DT_appl DESC, S.SL_NO_order DESC
         """)