diff --git a/apps/st/src/components/module/DataGrid.tsx b/apps/st/src/components/module/DataGrid.tsx
index a87005031..cef70a624 100644
--- a/apps/st/src/components/module/DataGrid.tsx
+++ b/apps/st/src/components/module/DataGrid.tsx
@@ -289,14 +289,28 @@ type GridViewWithSetColumnProperty = {
 };
 
 type GridViewWithEditOptions = {
-    setEditOptions?: (options: { commitWhenLeave?: boolean }) => void;
+    setEditOptions?: (options: {
+        commitWhenLeave?: boolean;
+        appendable?: boolean;
+        insertable?: boolean;
+    }) => void;
+    setPasteOptions?: (options: { enableAppend?: boolean }) => void;
 };
 
 /** 포커스가 그리드 밖으로 나갈 때 편집 중인 값을 자동 commit */
 function applyDefaultGridEditOptions(
     gridView: GridViewWithEditOptions | null | undefined,
+    options?: { preventRowAppend?: boolean },
 ) {
-    gridView?.setEditOptions?.({ commitWhenLeave: true });
+    gridView?.setEditOptions?.({
+        commitWhenLeave: true,
+        ...(options?.preventRowAppend
+            ? { appendable: false, insertable: false }
+            : {}),
+    });
+    if (options?.preventRowAppend) {
+        gridView?.setPasteOptions?.({ enableAppend: false });
+    }
 }
 
 function isDateEditorColumn(column: {
@@ -853,6 +867,7 @@ const DataGrid = ({
     gridHeight = 55, // vh 단위
     headerHeight = 60,
     fitStyle = GridFitStyle.EVEN,
+    preventRowAppend = true,
 }: DataGridProps) => {
     const { columns, columnLayout } = columnInfo;
     const fixedColumnNameSet = useMemo(
@@ -1467,7 +1482,9 @@ useEffect(() => {
         const scheduleFooterTask = (task: () => void, delayMs: number) => {
             footerTimerIds.push(setTimeout(task, delayMs));
         };
-        applyDefaultGridEditOptions(gridView as GridViewWithEditOptions);
+        applyDefaultGridEditOptions(gridView as GridViewWithEditOptions, {
+            preventRowAppend,
+        });
 
         const columnsFieldsSig = columns.map((c) => c.fieldName).join("\u0001");
         if (columnsFieldsSig !== columnsFieldsSigRef.current) {
@@ -1990,6 +2007,7 @@ useEffect(() => {
         fitStyle,
         enableSort,
         footerVerificationResult,
+        preventRowAppend,
     ]);
 
     // 행·셀 클릭 이벤트 (검증 오류 툴팁은 hover만 — onShowTooltip / 빈 셀 오버레이)
@@ -2527,6 +2545,7 @@ useEffect(() => {
                         const gridView = gridRef.current?.gridView ?? grid;
                         applyDefaultGridEditOptions(
                             gridView as GridViewWithEditOptions,
+                            { preventRowAppend },
                         );
                         if (!gridView?.columnByName) return;
                         setTimeout(() => {
diff --git a/apps/st/src/components/type/DataGrid.type.ts b/apps/st/src/components/type/DataGrid.type.ts
index 7d2a82625..0899bf560 100644
--- a/apps/st/src/components/type/DataGrid.type.ts
+++ b/apps/st/src/components/type/DataGrid.type.ts
@@ -481,6 +481,11 @@ export type DataGridProps = {
     headerHeight?: number;
     /** RealGrid `displayOptions.fitStyle` (기본 EVEN). 컬럼별 width 유지 시 NONE */
     fitStyle?: GridFitStyle;
+    /**
+     * true면 붙여넣기·편집으로 행을 추가하지 않음.
+     * 검증 결과처럼 조회 행 수가 고정된 그리드에서 사용.
+     */
+    preventRowAppend?: boolean;
 };
 
 export type TabDataGridProps = {