diff --git a/frontend/lib/registry/components/modal-repeater-table/RepeaterTable.tsx b/frontend/lib/registry/components/modal-repeater-table/RepeaterTable.tsx
index c9aa2cfd..703256b2 100644
--- a/frontend/lib/registry/components/modal-repeater-table/RepeaterTable.tsx
+++ b/frontend/lib/registry/components/modal-repeater-table/RepeaterTable.tsx
@@ -75,10 +75,28 @@ export function RepeaterTable({
         );
 
       case "date":
+        // ISO 형식(2025-11-23T00:00:00.000Z)을 yyyy-mm-dd로 변환
+        const formatDateValue = (val: any): string => {
+          if (!val) return "";
+          // 이미 yyyy-mm-dd 형식이면 그대로 반환
+          if (typeof val === "string" && /^\d{4}-\d{2}-\d{2}$/.test(val)) {
+            return val;
+          }
+          // ISO 형식이면 날짜 부분만 추출
+          if (typeof val === "string" && val.includes("T")) {
+            return val.split("T")[0];
+          }
+          // Date 객체이면 변환
+          if (val instanceof Date) {
+            return val.toISOString().split("T")[0];
+          }
+          return String(val);
+        };
+        
         return (
           <Input
             type="date"
-            value={value || ""}
+            value={formatDateValue(value)}
             onChange={(e) => handleCellEdit(rowIndex, column.field, e.target.value)}
             className="h-7 text-xs"
           />