diff --git a/frontend/app/components/books/BookCardHeader.tsx b/frontend/app/components/books/BookCardHeader.tsx
index 85d66002..d769ed51 100644
--- a/frontend/app/components/books/BookCardHeader.tsx
+++ b/frontend/app/components/books/BookCardHeader.tsx
@@ -1,7 +1,7 @@
 import { Checkbox, Group } from '@mantine/core';
 import { useAtom } from 'jotai';
+import { selectedBooksAtom } from '~/stores/bookAtom';
 import type { CartProps } from '~/stores/cartAtom';
-import { selectedBooksAtom } from '~/stores/cartAtom';
 import { userAtom } from '~/stores/userAtom';
 import BookCardHeaderBadge from './BookCardHeaderBadge';
 
diff --git a/frontend/app/routes/home._index/route.tsx b/frontend/app/routes/home._index/route.tsx
index e69e1fef..76427eb8 100644
--- a/frontend/app/routes/home._index/route.tsx
+++ b/frontend/app/routes/home._index/route.tsx
@@ -8,7 +8,7 @@ import { GetBooksParams } from 'client/client.schemas';
 import { useAtom } from 'jotai';
 import { useEffect } from 'react';
 import BookListComponent from '~/components/books/BookListComponent';
-import { selectedBooksAtom } from '~/stores/cartAtom';
+import { selectedBooksAtom } from '~/stores/bookAtom';
 
 interface LoaderData {
 	booksResponse: getBooksResponse;
diff --git a/frontend/app/stores/bookAtom.ts b/frontend/app/stores/bookAtom.ts
new file mode 100644
index 00000000..a8308dfe
--- /dev/null
+++ b/frontend/app/stores/bookAtom.ts
@@ -0,0 +1,10 @@
+import { atom } from 'jotai';
+
+export interface SelectedBookProps {
+	id: number;
+	stock: number;
+}
+
+// 選択された本を管理するAtom
+// 生存時間: DOM(ページをリロードするまで)
+export const selectedBooksAtom = atom<SelectedBookProps[]>([]);
diff --git a/frontend/app/stores/cartAtom.ts b/frontend/app/stores/cartAtom.ts
index a0d681cf..c4769c90 100644
--- a/frontend/app/stores/cartAtom.ts
+++ b/frontend/app/stores/cartAtom.ts
@@ -1,4 +1,3 @@
-import { atom } from 'jotai';
 import { atomWithStorage, createJSONStorage } from 'jotai/utils';
 
 const storage = createJSONStorage<CartProps[]>(() => sessionStorage);
@@ -10,7 +9,3 @@ export interface CartProps {
 // カートの中身を管理するAtom
 // 生存時間: セッションストレージ(タブが閉じられるまで)
 export const cartAtom = atomWithStorage<CartProps[]>('cart', [], storage);
-
-// 選択された本を管理するAtom
-// 生存時間: DOM(ページをリロードするまで)
-export const selectedBooksAtom = atom<CartProps[]>([]);