diff --git a/src/renderer/inbox/components/NotebookList.tsx b/src/renderer/inbox/components/NotebookList.tsx
index 19091a6..ddb2886 100644
--- a/src/renderer/inbox/components/NotebookList.tsx
+++ b/src/renderer/inbox/components/NotebookList.tsx
@@ -1,4 +1,4 @@
-import React from 'react';
+import React, { useState } from 'react';
 import type { Notebook } from '@shared/types';
 
 interface Props {
@@ -6,33 +6,63 @@ interface Props {
   selectedId: string | null;
   onSelect: (id: string) => void;
   onCreate: () => void;
+  onReorder?: (id: string, direction: 'up' | 'down') => Promise<void>;
 }
 
-export function NotebookList({ notebooks, selectedId, onSelect, onCreate }: Props): React.ReactElement {
+export function NotebookList({ notebooks, selectedId, onSelect, onCreate, onReorder }: Props): React.ReactElement {
+  const [hoverId, setHoverId] = useState<string | null>(null);
+
   return (
     <div style={{ display: 'flex', flexDirection: 'column' }}>
-      {notebooks.map((nb) => {
+      {notebooks.map((nb, idx) => {
         const active = nb.id === selectedId;
+        const hover = nb.id === hoverId;
+        const isFirst = idx === 0;
+        const isLast = idx === notebooks.length - 1;
         return (
-          <button
+          <div
             key={nb.id}
-            onClick={() => onSelect(nb.id)}
-            style={{
-              display: 'flex', alignItems: 'center', gap: 8,
-              padding: '6px 12px', background: active ? '#eaf3ff' : 'transparent',
-              border: 'none', cursor: 'pointer', textAlign: 'left',
-              color: active ? '#0a4b80' : '#333', fontSize: 13
-            }}
+            onMouseEnter={() => setHoverId(nb.id)}
+            onMouseLeave={() => setHoverId(null)}
+            style={{ position: 'relative', display: 'flex' }}
           >
-            <span style={{
-              width: 8, height: 8, borderRadius: '50%',
-              background: nb.color ?? '#bbb', flexShrink: 0
-            }} />
-            <span style={{ flex: 1, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
-              {nb.name}
-            </span>
-            <span style={{ fontSize: 11, color: '#888' }}>{nb.noteCount}</span>
-          </button>
+            <button
+              onClick={() => onSelect(nb.id)}
+              style={{
+                display: 'flex', alignItems: 'center', gap: 8,
+                padding: '6px 12px', background: active ? '#eaf3ff' : 'transparent',
+                border: 'none', cursor: 'pointer', textAlign: 'left',
+                color: active ? '#0a4b80' : '#333', fontSize: 13, flex: 1
+              }}
+            >
+              <span style={{
+                width: 8, height: 8, borderRadius: '50%',
+                background: nb.color ?? '#bbb', flexShrink: 0
+              }} />
+              <span style={{ flex: 1, overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap' }}>
+                {nb.name}
+              </span>
+              <span style={{ fontSize: 11, color: '#888' }}>{nb.noteCount}</span>
+            </button>
+            {hover && onReorder && notebooks.length > 1 && (
+              <div style={{ position: 'absolute', right: 4, top: 2, display: 'flex', gap: 2 }}>
+                <button
+                  onClick={(e) => { e.stopPropagation(); if (!isFirst) void onReorder(nb.id, 'up'); }}
+                  disabled={isFirst}
+                  aria-label={`${nb.name} 위로`}
+                  title="위로"
+                  style={{ background: 'rgba(255,255,255,0.9)', border: '1px solid #ccc', borderRadius: 3, fontSize: 10, padding: '0 4px', cursor: isFirst ? 'not-allowed' : 'pointer', opacity: isFirst ? 0.3 : 1 }}
+                >▲</button>
+                <button
+                  onClick={(e) => { e.stopPropagation(); if (!isLast) void onReorder(nb.id, 'down'); }}
+                  disabled={isLast}
+                  aria-label={`${nb.name} 아래로`}
+                  title="아래로"
+                  style={{ background: 'rgba(255,255,255,0.9)', border: '1px solid #ccc', borderRadius: 3, fontSize: 10, padding: '0 4px', cursor: isLast ? 'not-allowed' : 'pointer', opacity: isLast ? 0.3 : 1 }}
+                >▼</button>
+              </div>
+            )}
+          </div>
         );
       })}
       <button
diff --git a/src/renderer/inbox/components/Sidebar.tsx b/src/renderer/inbox/components/Sidebar.tsx
index 3919c5d..f5f9c62 100644
--- a/src/renderer/inbox/components/Sidebar.tsx
+++ b/src/renderer/inbox/components/Sidebar.tsx
@@ -9,6 +9,7 @@ export function Sidebar(): React.ReactElement | null {
   const notebooks = useInbox((s) => s.notebooks);
   const selectedId = useInbox((s) => s.selectedNotebookId);
   const selectNotebook = useInbox((s) => s.selectNotebook);
+  const reorderNotebook = useInbox((s) => s.reorderNotebook);
   const [createOpen, setCreateOpen] = useState(false);
 
   if (!visible) return null;
@@ -24,6 +25,7 @@ export function Sidebar(): React.ReactElement | null {
         selectedId={selectedId}
         onSelect={selectNotebook}
         onCreate={() => setCreateOpen(true)}
+        onReorder={reorderNotebook}
       />
       {createOpen && <NotebookCreateModal onClose={() => setCreateOpen(false)} />}
     </aside>
diff --git a/src/renderer/inbox/store.ts b/src/renderer/inbox/store.ts
index f4fbe77..900106c 100644
--- a/src/renderer/inbox/store.ts
+++ b/src/renderer/inbox/store.ts
@@ -91,6 +91,7 @@ interface InboxState {
   setNotebookColor: (id: string, color: string | null) => Promise<void>;
   deleteNotebook: (id: string) => Promise<{ ok: boolean; reason?: string }>;
   moveNoteToNotebook: (noteId: string, notebookId: string) => Promise<void>;
+  reorderNotebook: (id: string, direction: 'up' | 'down') => Promise<void>;
   toggleSidebar: () => void;
   // v0.4 Task 11 — promotion candidate actions.
   loadPromotionCandidates: () => Promise<void>;
@@ -486,6 +487,12 @@ export const useInbox = create<InboxState>((set, get) => ({
     await notebookApi.moveNote(noteId, notebookId);
     await get().refreshMeta();
   },
+  async reorderNotebook(id, direction) {
+    const r = await notebookApi.reorder(id, direction);
+    if (r.ok) {
+      await get().loadNotebooks();
+    }
+  },
   toggleSidebar() {
     const next = !get().sidebarVisible;
     set({ sidebarVisible: next });
diff --git a/tests/unit/NotebookList.test.tsx b/tests/unit/NotebookList.test.tsx
index 279ae0c..e2e8f81 100644
--- a/tests/unit/NotebookList.test.tsx
+++ b/tests/unit/NotebookList.test.tsx
@@ -41,4 +41,32 @@ describe('NotebookList', () => {
     expect(btn1.style.background).not.toBe('transparent');
     expect(btn2.style.background).toBe('transparent');
   });
+
+  it('hover 시 ↑↓ 버튼 노출', () => {
+    const { container } = render(<NotebookList notebooks={notebooks} selectedId="nb-1" onSelect={() => {}} onCreate={() => {}} onReorder={async () => {}} />);
+    // 기본 상태: ↑↓ 미노출
+    expect(screen.queryByLabelText(/위로/)).not.toBeInTheDocument();
+    // hover 후 보임 — position:relative 인 row div 선택
+    const row = container.querySelector('div[style*="position: relative"]') as HTMLElement;
+    fireEvent.mouseEnter(row);
+    expect(screen.getAllByLabelText(/위로/).length).toBeGreaterThan(0);
+  });
+
+  it('↑ 클릭 시 onReorder up 호출', () => {
+    const onReorder = vi.fn();
+    const { container } = render(<NotebookList notebooks={notebooks} selectedId="nb-2" onSelect={() => {}} onCreate={() => {}} onReorder={onReorder} />);
+    const rows = container.querySelectorAll('div[style*="position: relative"]');
+    // 두번째 row (nb-2) hover → 위로 클릭
+    fireEvent.mouseEnter(rows[1] as Element);
+    fireEvent.click(screen.getByLabelText('회사 위로'));
+    expect(onReorder).toHaveBeenCalledWith('nb-2', 'up');
+  });
+
+  it('첫 row 의 ↑ 는 disabled', () => {
+    const { container } = render(<NotebookList notebooks={notebooks} selectedId="nb-1" onSelect={() => {}} onCreate={() => {}} onReorder={async () => {}} />);
+    const rows = container.querySelectorAll('div[style*="position: relative"]');
+    fireEvent.mouseEnter(rows[0] as Element);
+    const upBtn = screen.getByLabelText('기본 위로');
+    expect(upBtn).toBeDisabled();
+  });
 });
diff --git a/tests/unit/store.notebook.test.ts b/tests/unit/store.notebook.test.ts
index e9b007d..84b2396 100644
--- a/tests/unit/store.notebook.test.ts
+++ b/tests/unit/store.notebook.test.ts
@@ -1,8 +1,9 @@
 import { describe, it, expect, vi, beforeEach } from 'vitest';
 
-const { mockListByStatus, mockCountsByStatus } = vi.hoisted(() => ({
+const { mockListByStatus, mockCountsByStatus, mockReorder } = vi.hoisted(() => ({
   mockListByStatus: vi.fn(async () => []),
-  mockCountsByStatus: vi.fn(async () => ({ active: 0, completed: 0, archived: 0, trashed: 0 }))
+  mockCountsByStatus: vi.fn(async () => ({ active: 0, completed: 0, archived: 0, trashed: 0 })),
+  mockReorder: vi.fn(async () => ({ ok: true as const }))
 }));
 
 vi.mock('../../src/renderer/inbox/api.js', () => ({
@@ -32,7 +33,8 @@ vi.mock('../../src/renderer/inbox/api.js', () => ({
     delete: vi.fn(async () => ({ ok: true as const })),
     rename: vi.fn(async () => ({ ok: true as const })),
     setColor: vi.fn(async () => ({ ok: true as const })),
-    moveNote: vi.fn(async () => ({ ok: true as const }))
+    moveNote: vi.fn(async () => ({ ok: true as const })),
+    reorder: mockReorder
   }
 }));
 
@@ -42,6 +44,7 @@ describe('store notebooks', () => {
   beforeEach(() => {
     mockListByStatus.mockClear();
     mockCountsByStatus.mockClear();
+    mockReorder.mockClear();
     useInbox.setState({ notebooks: [], selectedNotebookId: null, sidebarVisible: false, sidebarWidth: 240, view: 'inbox' } as never);
   });
 
@@ -116,4 +119,11 @@ describe('store notebooks', () => {
     // countsByStatus 는 refreshMeta 경로로 호출됨
     expect(mockCountsByStatus).toHaveBeenCalled();
   });
+
+  it('reorderNotebook 성공 시 notebookApi.reorder 호출 + loadNotebooks 재로드', async () => {
+    await useInbox.getState().reorderNotebook('nb-1', 'down');
+    expect(mockReorder).toHaveBeenCalledWith('nb-1', 'down');
+    // loadNotebooks 가 호출되어 notebooks 가 갱신됨
+    expect(useInbox.getState().notebooks).toHaveLength(2);
+  });
 });