diff --git a/frontend/components/common/ScreenModal.tsx b/frontend/components/common/ScreenModal.tsx
index 47cb7549..a57b5ed4 100644
--- a/frontend/components/common/ScreenModal.tsx
+++ b/frontend/components/common/ScreenModal.tsx
@@ -1218,6 +1218,7 @@ export const ScreenModal: React.FC<ScreenModalProps> = ({ className }) => {
                         userId={userId}
                         userName={userName}
                         companyCode={user?.companyCode}
+                        isInModal={true}
                       />
                     );
                   });
@@ -1261,6 +1262,7 @@ export const ScreenModal: React.FC<ScreenModalProps> = ({ className }) => {
                         userId={userId}
                         userName={userName}
                         companyCode={user?.companyCode}
+                        isInModal={true}
                       />
                     );
                   })}
diff --git a/frontend/components/screen/InteractiveScreenViewerDynamic.tsx b/frontend/components/screen/InteractiveScreenViewerDynamic.tsx
index a35c5ed2..249f92eb 100644
--- a/frontend/components/screen/InteractiveScreenViewerDynamic.tsx
+++ b/frontend/components/screen/InteractiveScreenViewerDynamic.tsx
@@ -14,6 +14,7 @@ import { DynamicWebTypeRenderer } from "@/lib/registry";
 import { DynamicComponentRenderer } from "@/lib/registry/DynamicComponentRenderer";
 import { filterDOMProps } from "@/lib/utils/domPropsFilter";
 import { isFileComponent, isDataTableComponent, isButtonComponent } from "@/lib/utils/componentTypeUtils";
+import { isFieldEmpty } from "@/lib/utils/formValidation";
 import { FlowButtonGroup } from "./widgets/FlowButtonGroup";
 import { FlowVisibilityConfig } from "@/types/control-management";
 import { findAllButtonGroups } from "@/lib/utils/flowButtonGroupUtils";
@@ -447,6 +448,7 @@ export const InteractiveScreenViewerDynamic: React.FC<InteractiveScreenViewerPro
           onClose={() => {
             // buttonActions.ts가 이미 처리함
           }}
+          isInModal={isInModal}
           // 탭 관련 정보 전달
           parentTabId={parentTabId}
           parentTabsComponentId={parentTabsComponentId}
@@ -956,7 +958,7 @@ export const InteractiveScreenViewerDynamic: React.FC<InteractiveScreenViewerPro
 
     // 커스텀 색상이 있으면 Tailwind 클래스 대신 직접 스타일 적용
     const hasCustomColors = config?.backgroundColor || config?.textColor || comp.style?.backgroundColor || comp.style?.color;
-    
+
     return (
       <button
         onClick={handleClick}
@@ -1119,6 +1121,42 @@ export const InteractiveScreenViewerDynamic: React.FC<InteractiveScreenViewerPro
   const labelMarginBottom = style?.labelMarginBottom ? parseInt(String(style.labelMarginBottom)) : 4;
   const labelOffset = (hasVisibleLabel && isVerticalLabel) ? (labelFontSize + labelMarginBottom + 2) : 0;
 
+  // 필수 입력값 검증 (모달 내부에서만 에러 표시)
+  const reqCompType = component.type;
+  const reqCompComponentType = (component as any).componentType || "";
+  const isInputLikeComponent = reqCompType === "widget" || (
+    reqCompType === "component" && (
+      reqCompComponentType.startsWith("v2-input") ||
+      reqCompComponentType.startsWith("v2-select") ||
+      reqCompComponentType.startsWith("v2-date") ||
+      reqCompComponentType.startsWith("v2-textarea") ||
+      reqCompComponentType.startsWith("v2-number") ||
+      reqCompComponentType === "entity-search-input" ||
+      reqCompComponentType === "autocomplete-search-input"
+    )
+  );
+  const isRequiredWidget = isInputLikeComponent && (
+    (component as any).required === true ||
+    (style as any)?.required === true ||
+    (component as any).componentConfig?.required === true ||
+    (component as any).overrides?.required === true
+  );
+  const isAutoInputField =
+    (component as any).inputType === "auto" ||
+    (component as any).componentConfig?.inputType === "auto" ||
+    (component as any).overrides?.inputType === "auto";
+  const isReadonlyWidget =
+    (component as any).readonly === true ||
+    (component as any).componentConfig?.readonly === true ||
+    (component as any).overrides?.readonly === true;
+  const requiredFieldName =
+    (component as any).columnName ||
+    (component as any).componentConfig?.columnName ||
+    (component as any).overrides?.columnName ||
+    component.id;
+  const requiredFieldValue = formData[requiredFieldName];
+  const showRequiredError = isInModal && isRequiredWidget && !isAutoInputField && !isReadonlyWidget && isFieldEmpty(requiredFieldValue);
+
   const calculateCanvasSplitX = (): { x: number; w: number } => {
     const compType = (component as any).componentType || "";
     const isSplitLine = type === "component" && compType === "v2-split-line";
@@ -1204,7 +1242,7 @@ export const InteractiveScreenViewerDynamic: React.FC<InteractiveScreenViewerPro
     width: isSplitActive ? adjustedW : (size?.width || 200),
     height: isTableSearchWidget ? "auto" : size?.height || 10,
     minHeight: isTableSearchWidget ? "48px" : undefined,
-    overflow: (isSplitActive && adjustedW < origW) ? "hidden" : (labelOffset > 0 ? "visible" : undefined),
+    overflow: (isSplitActive && adjustedW < origW) ? "hidden" : ((labelOffset > 0 || showRequiredError) ? "visible" : undefined),
     willChange: canvasSplit.isDragging && isSplitActive ? "left, width" as const : undefined,
     transition: isSplitActive
       ? (canvasSplit.isDragging ? "none" : "left 0.15s ease-out, width 0.15s ease-out")
@@ -1317,6 +1355,11 @@ export const InteractiveScreenViewerDynamic: React.FC<InteractiveScreenViewerPro
         ) : (
           renderInteractiveWidget(componentToRender)
         )}
+        {showRequiredError && (
+          <p className="text-destructive pointer-events-none absolute left-0 text-[11px] leading-tight" style={{ top: "100%", marginTop: 2 }}>
+            필수 입력 항목입니다
+          </p>
+        )}
       </div>
 
       {/* 팝업 화면 렌더링 */}
diff --git a/frontend/components/screen/SaveModal.tsx b/frontend/components/screen/SaveModal.tsx
index 1c848d6a..18c9127b 100644
--- a/frontend/components/screen/SaveModal.tsx
+++ b/frontend/components/screen/SaveModal.tsx
@@ -11,6 +11,7 @@ import { screenApi } from "@/lib/api/screen";
 import { dynamicFormApi, DynamicFormData } from "@/lib/api/dynamicForm";
 import { ComponentData } from "@/lib/types/screen";
 import { useAuth } from "@/hooks/useAuth";
+import { checkAllRequiredFieldsFilled } from "@/lib/utils/formValidation";
 
 interface SaveModalProps {
   isOpen: boolean;
@@ -304,6 +305,7 @@ export const SaveModal: React.FC<SaveModalProps> = ({
   };
 
   const dynamicSize = calculateDynamicSize();
+  const isRequiredFieldsMissing = !checkAllRequiredFieldsFilled(components, formData);
 
   return (
     <Dialog open={isOpen} onOpenChange={(open) => !isSaving && !open && onClose()}>
@@ -320,7 +322,13 @@ export const SaveModal: React.FC<SaveModalProps> = ({
           <div className="flex items-center justify-between">
             <DialogTitle className="text-lg font-semibold">{initialData ? "데이터 수정" : "데이터 등록"}</DialogTitle>
             <div className="flex items-center gap-2">
-              <Button onClick={handleSave} disabled={isSaving} size="sm" className="gap-2">
+              <Button
+                onClick={handleSave}
+                disabled={isSaving || isRequiredFieldsMissing}
+                title={isRequiredFieldsMissing ? "필수 입력 항목을 모두 채워주세요" : undefined}
+                size="sm"
+                className="gap-2"
+              >
                 {isSaving ? (
                   <>
                     <Loader2 className="h-4 w-4 animate-spin" />
diff --git a/frontend/lib/registry/components/button-primary/ButtonPrimaryComponent.tsx b/frontend/lib/registry/components/button-primary/ButtonPrimaryComponent.tsx
index f753a240..529f78fb 100644
--- a/frontend/lib/registry/components/button-primary/ButtonPrimaryComponent.tsx
+++ b/frontend/lib/registry/components/button-primary/ButtonPrimaryComponent.tsx
@@ -27,6 +27,7 @@ import { useScreenContextOptional } from "@/contexts/ScreenContext";
 import { useSplitPanelContext, SplitPanelPosition } from "@/contexts/SplitPanelContext";
 import { applyMappingRules } from "@/lib/utils/dataMapping";
 import { apiClient } from "@/lib/api/client";
+import { checkAllRequiredFieldsFilled } from "@/lib/utils/formValidation";
 
 export interface ButtonPrimaryComponentProps extends ComponentRendererProps {
   config?: ButtonPrimaryConfig;
@@ -1258,9 +1259,16 @@ export const ButtonPrimaryComponent: React.FC<ButtonPrimaryComponentProps> = ({
     }
   }
 
-  // 🆕 최종 비활성화 상태 (설정 + 조건부 비활성화 + 행 선택 필수)
+  // 모달 내 저장 버튼: 필수 필드 미입력 시 비활성화
+  const isInModalContext = (props as any).isInModal === true;
+  const isSaveAction = processedConfig.action?.type === "save";
+  const isRequiredFieldsMissing = isSaveAction && isInModalContext && allComponents
+    ? !checkAllRequiredFieldsFilled(allComponents, formData || {})
+    : false;
+
+  // 🆕 최종 비활성화 상태 (설정 + 조건부 비활성화 + 행 선택 필수 + 필수 필드 미입력)
   const finalDisabled =
-    componentConfig.disabled || isOperationButtonDisabled || isRowSelectionDisabled || statusLoading;
+    componentConfig.disabled || isOperationButtonDisabled || isRowSelectionDisabled || statusLoading || isRequiredFieldsMissing;
 
   // 공통 버튼 스타일
   // 🔧 component.style에서 background/backgroundColor 충돌 방지
@@ -1317,6 +1325,7 @@ export const ButtonPrimaryComponent: React.FC<ButtonPrimaryComponentProps> = ({
           <button
             type={componentConfig.actionType || "button"}
             disabled={finalDisabled}
+            title={isRequiredFieldsMissing ? "필수 입력 항목을 모두 채워주세요" : undefined}
             className="transition-colors transition-transform duration-150 hover:opacity-90 active:scale-95"
             style={buttonElementStyle}
             onClick={handleClick}
diff --git a/frontend/lib/registry/components/v2-button-primary/ButtonPrimaryComponent.tsx b/frontend/lib/registry/components/v2-button-primary/ButtonPrimaryComponent.tsx
index c00c1b1f..4e10f77c 100644
--- a/frontend/lib/registry/components/v2-button-primary/ButtonPrimaryComponent.tsx
+++ b/frontend/lib/registry/components/v2-button-primary/ButtonPrimaryComponent.tsx
@@ -28,6 +28,7 @@ import { useSplitPanelContext, SplitPanelPosition } from "@/contexts/SplitPanelC
 import { applyMappingRules } from "@/lib/utils/dataMapping";
 import { apiClient } from "@/lib/api/client";
 import { V2ErrorBoundary, v2EventBus, V2_EVENTS } from "@/lib/v2-core";
+import { checkAllRequiredFieldsFilled } from "@/lib/utils/formValidation";
 
 export interface ButtonPrimaryComponentProps extends ComponentRendererProps {
   config?: ButtonPrimaryConfig;
@@ -1216,15 +1217,6 @@ export const ButtonPrimaryComponent: React.FC<ButtonPrimaryComponentProps> = ({
         effectiveFormData = { ...splitPanelParentData };
       }
 
-      console.log("🔴 [ButtonPrimary] 저장 시 formData 디버그:", {
-        propsFormDataKeys: Object.keys(propsFormData),
-        screenContextFormDataKeys: Object.keys(screenContextFormData),
-        effectiveFormDataKeys: Object.keys(effectiveFormData),
-        process_code: effectiveFormData.process_code,
-        equipment_code: effectiveFormData.equipment_code,
-        fullData: JSON.stringify(effectiveFormData),
-      });
-
       const context: ButtonActionContext = {
         formData: effectiveFormData,
         originalData: originalData, // 🔧 빈 객체 대신 undefined 유지 (UPDATE 판단에 사용)
@@ -1381,9 +1373,16 @@ export const ButtonPrimaryComponent: React.FC<ButtonPrimaryComponentProps> = ({
     }
   }
 
-  // 🆕 최종 비활성화 상태 (설정 + 조건부 비활성화 + 행 선택 필수)
+  // 모달 내 저장 버튼: 필수 필드 미입력 시 비활성화
+  const isInModalContext = (props as any).isInModal === true;
+  const isSaveAction = processedConfig.action?.type === "save";
+  const isRequiredFieldsMissing = isSaveAction && isInModalContext && allComponents
+    ? !checkAllRequiredFieldsFilled(allComponents, formData || {})
+    : false;
+
+  // 최종 비활성화 상태 (설정 + 조건부 비활성화 + 행 선택 필수 + 필수 필드 미입력)
   const finalDisabled =
-    componentConfig.disabled || isOperationButtonDisabled || isRowSelectionDisabled || statusLoading;
+    componentConfig.disabled || isOperationButtonDisabled || isRowSelectionDisabled || statusLoading || isRequiredFieldsMissing;
 
   // 공통 버튼 스타일
   // 🔧 component.style에서 background/backgroundColor 충돌 방지 (width/height는 허용)
@@ -1470,6 +1469,7 @@ export const ButtonPrimaryComponent: React.FC<ButtonPrimaryComponentProps> = ({
           <button
             type={componentConfig.actionType || "button"}
             disabled={finalDisabled}
+            title={isRequiredFieldsMissing ? "필수 입력 항목을 모두 채워주세요" : undefined}
             className="transition-colors transition-transform duration-150 hover:opacity-90 active:scale-95"
             style={buttonElementStyle}
             onClick={handleClick}
diff --git a/frontend/lib/utils/formValidation.ts b/frontend/lib/utils/formValidation.ts
index c521455c..b51c4ead 100644
--- a/frontend/lib/utils/formValidation.ts
+++ b/frontend/lib/utils/formValidation.ts
@@ -661,3 +661,76 @@ const calculateStringSimilarity = (str1: string, str2: string): number => {
 
   return maxLen === 0 ? 1 : (maxLen - distance) / maxLen;
 };
+
+/**
+ * 값이 비어있는지 판별
+ */
+export const isFieldEmpty = (value: any): boolean => {
+  return (
+    value === null ||
+    value === undefined ||
+    (typeof value === "string" && value.trim() === "") ||
+    (Array.isArray(value) && value.length === 0)
+  );
+};
+
+/**
+ * 입력 가능한 컴포넌트인지 판별 (위젯 또는 V2 입력 컴포넌트)
+ */
+const isInputComponent = (comp: any): boolean => {
+  if (comp.type === "widget") return true;
+
+  if (comp.type === "component") {
+    const ct = comp.componentType || "";
+    return ct.startsWith("v2-input") ||
+      ct.startsWith("v2-select") ||
+      ct.startsWith("v2-date") ||
+      ct.startsWith("v2-textarea") ||
+      ct.startsWith("v2-number") ||
+      ct === "entity-search-input" ||
+      ct === "autocomplete-search-input";
+  }
+  return false;
+};
+
+/**
+ * 모든 필수 필드가 채워졌는지 판별 (모달 저장 버튼 비활성화용)
+ * auto 입력 필드, readonly 필드는 검증 제외
+ */
+export const checkAllRequiredFieldsFilled = (
+  allComponents: any[],
+  formData: Record<string, any>,
+): boolean => {
+  for (const comp of allComponents) {
+    if (!isInputComponent(comp)) continue;
+
+    const isRequired =
+      comp.required === true ||
+      comp.style?.required === true ||
+      comp.componentConfig?.required === true ||
+      comp.overrides?.required === true;
+    if (!isRequired) continue;
+
+    const isAutoInput =
+      comp.inputType === "auto" ||
+      comp.componentConfig?.inputType === "auto" ||
+      comp.overrides?.inputType === "auto";
+    const isReadonly =
+      comp.readonly === true ||
+      comp.componentConfig?.readonly === true ||
+      comp.overrides?.readonly === true;
+    if (isAutoInput || isReadonly) continue;
+
+    const fieldName =
+      comp.columnName ||
+      comp.componentConfig?.columnName ||
+      comp.overrides?.columnName ||
+      comp.id;
+    const value = formData[fieldName];
+
+    if (isFieldEmpty(value)) {
+      return false;
+    }
+  }
+  return true;
+};