diff --git a/backend/src/main/java/com/example/todoapp/repository/StuffsRepository.java b/backend/src/main/java/com/example/todoapp/repository/StuffsRepository.java
index f2fb344..065fe18 100644
--- a/backend/src/main/java/com/example/todoapp/repository/StuffsRepository.java
+++ b/backend/src/main/java/com/example/todoapp/repository/StuffsRepository.java
@@ -39,6 +39,6 @@ public interface StuffsRepository extends JpaRepository<Stuffs, Long> {
      * @param category カテゴリ名
      * @return 指定されたカテゴリに属する材料のリスト
      */
-    List<Stuffs> findByCategory(String category);
+    List<Stuffs> findByCategoryOrderByStuffNameAsc(String category);
 
 }
\ No newline at end of file
diff --git a/backend/src/main/java/com/example/todoapp/service/StuffsService.java b/backend/src/main/java/com/example/todoapp/service/StuffsService.java
index 18b3924..4c8426f 100644
--- a/backend/src/main/java/com/example/todoapp/service/StuffsService.java
+++ b/backend/src/main/java/com/example/todoapp/service/StuffsService.java
@@ -34,6 +34,6 @@ public class StuffsService {
      * @return 指定されたカテゴリに属する材料のリスト
      */
     public List<Stuffs> getAllStuffsByCategory(String category) {
-        return stuffsRepository.findByCategory(category);
+        return stuffsRepository.findByCategoryOrderByStuffNameAsc(category);
     }
 }