diff --git a/frontend/src/components/dashboard/DepartmentColumn.tsx b/frontend/src/components/dashboard/DepartmentColumn.tsx
index f0f8fa2..637e856 100644
--- a/frontend/src/components/dashboard/DepartmentColumn.tsx
+++ b/frontend/src/components/dashboard/DepartmentColumn.tsx
@@ -229,53 +229,35 @@ export function DepartmentColumn({ title: initialTitle, titleEn, subtitle: initi
           </div>
         )}
 
-        {/* ── 실행과제 영역 ── */}
-        <div className="flex flex-1 min-h-0">
-          {/* 좌측 라벨 */}
-          <div className="shrink-0 w-6 flex items-center justify-center bg-blue-50 border-r border-blue-100">
-            <span
-              className="text-xs font-black text-blue-300 tracking-widest select-none"
-              style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)' }}
-            >실행과제</span>
-          </div>
-          {/* 카드 목록 */}
-          <div
-            className="flex-1 overflow-y-auto p-4 min-h-0"
-            onContextMenu={handleListContextMenu}
-          >
-            {(() => {
-              const projectTasks = orderedTasks.filter((t) => t.taskType !== '상시업무');
-              return projectTasks.length === 0 ? (
-                <div className="flex items-center justify-center h-40 text-2xl text-gray-300">
-                  해당 업무 없음
-                </div>
-              ) : (
-                <DndContext sensors={sensors} collisionDetection={closestCenter} onDragEnd={handleDragEnd}>
-                  <SortableContext items={projectTasks.map((t) => t.id)} strategy={verticalListSortingStrategy}>
-                    {projectTasks.map((task) => (
-                      <SortableTaskCard key={task.id} task={task} sectionOptions={sectionOptions} onSelect={onSelectTask} />
-                    ))}
-                  </SortableContext>
-                </DndContext>
-              );
-            })()}
-          </div>
+        {/* 프로젝트 카드 목록 (스크롤 영역) */}
+        <div
+          className="flex-1 overflow-y-auto p-4 min-h-0"
+          onContextMenu={handleListContextMenu}
+        >
+          {(() => {
+            const projectTasks = orderedTasks.filter((t) => t.taskType !== '상시업무');
+            return projectTasks.length === 0 ? (
+              <div className="flex items-center justify-center h-40 text-2xl text-gray-300">
+                해당 업무 없음
+              </div>
+            ) : (
+              <DndContext sensors={sensors} collisionDetection={closestCenter} onDragEnd={handleDragEnd}>
+                <SortableContext items={projectTasks.map((t) => t.id)} strategy={verticalListSortingStrategy}>
+                  {projectTasks.map((task) => (
+                    <SortableTaskCard key={task.id} task={task} sectionOptions={sectionOptions} onSelect={onSelectTask} />
+                  ))}
+                </SortableContext>
+              </DndContext>
+            );
+          })()}
         </div>
 
-        {/* ── 기반업무 영역 ── */}
+        {/* 기반업무 고정 영역 */}
         {(() => {
           const routineTasks = orderedTasks.filter((t) => t.taskType === '상시업무');
           return (
-            <div className="shrink-0 flex border-t border-gray-200" style={{ height: 300 }}>
-              {/* 좌측 라벨 */}
-              <div className="shrink-0 w-6 flex items-center justify-center bg-amber-50 border-r border-amber-100">
-                <span
-                  className="text-xs font-black text-amber-400 tracking-widest select-none"
-                  style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)' }}
-                >기반업무</span>
-              </div>
-              {/* 카드 목록 */}
-              <div className="flex-1 overflow-y-auto p-4">
+            <div className="shrink-0 border-t border-gray-200" style={{ height: 300 }}>
+              <div className="h-full overflow-y-auto p-4">
                 {routineTasks.length === 0 ? (
                   <div className="flex items-center justify-center h-full text-base text-gray-300">
                     기반업무 없음
diff --git a/frontend/src/pages/DashboardPage.tsx b/frontend/src/pages/DashboardPage.tsx
index 7e67011..9ce404f 100644
--- a/frontend/src/pages/DashboardPage.tsx
+++ b/frontend/src/pages/DashboardPage.tsx
@@ -83,8 +83,29 @@ export default function DashboardPage() {
         onOpenTaskManager={() => setShowTaskManager(true)}
       />
 
-      <main className="relative flex-1 overflow-hidden min-h-0">
-        <div className="grid h-full grid-cols-4 overflow-hidden min-h-0">
+      <main className="relative flex-1 overflow-hidden min-h-0 flex">
+
+        {/* ── 맨 왼쪽 구분 라벨 컬럼 ── */}
+        <div className="shrink-0 w-8 flex flex-col border-r border-gray-200 bg-gray-50">
+          {/* 헤더 높이 맞춤 (DepartmentColumn 헤더 h-10) */}
+          <div className="h-10 shrink-0 border-b border-gray-200" />
+          {/* 실행과제 영역 (flex-1) */}
+          <div className="flex-1 flex items-center justify-center bg-blue-50/60 border-b border-gray-200">
+            <span
+              className="text-xs font-black text-blue-400 tracking-widest select-none"
+              style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)' }}
+            >실행과제</span>
+          </div>
+          {/* 기반업무 영역 (고정 300px) */}
+          <div className="shrink-0 flex items-center justify-center bg-amber-50/60" style={{ height: 300 }}>
+            <span
+              className="text-xs font-black text-amber-500 tracking-widest select-none"
+              style={{ writingMode: 'vertical-rl', transform: 'rotate(180deg)' }}
+            >기반업무</span>
+          </div>
+        </div>
+
+        <div className="grid flex-1 h-full grid-cols-4 overflow-hidden min-h-0">
           <DepartmentColumn
             title="인사관리"
             titleEn="HR Management"