diff --git a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryPageFragment.java b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryPageFragment.java
index 117f3ce6..1ae7481d 100644
--- a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryPageFragment.java
+++ b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryPageFragment.java
@@ -329,6 +329,20 @@ public class LibraryPageFragment extends Fragment {
                 } else if (item.getItemId() == R.id.menu_item_add_by_media) {
                     createDocByMediaPicker();
                     return true;
+                } else if (item.getItemId() == R.id.menu_item_delete_folder) {
+                    MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(requireContext());
+                    builder.setTitle("フォルダの削除");
+                    builder.setMessage("フォルダを削除しますか？");
+
+                    builder.setPositiveButton("削除", (dialog, which) -> {
+                        deleteMe();
+                    });
+                    builder.setNegativeButton("キャンセル", (dialog, which) -> {
+                        dialog.cancel();
+                    });
+
+                    builder.show();
+                    return true;
                 } else {
                     return false;
                 }
@@ -336,6 +350,12 @@ public class LibraryPageFragment extends Fragment {
         });
     }
 
+    private void deleteMe() {
+        lacertaLibrary.deleteFolder(this.folderId).thenAccept(aVoid -> {
+            Navigation.findNavController(requireView()).popBackStack();
+        });
+    }
+
     /**
      * メディアピッカーを使用してドキュメントを作成する(呼び出し部分)
      */
diff --git a/feature/library/src/main/res/menu/dir_menu.xml b/feature/library/src/main/res/menu/dir_menu.xml
index 387474a1..872e777b 100644
--- a/feature/library/src/main/res/menu/dir_menu.xml
+++ b/feature/library/src/main/res/menu/dir_menu.xml
@@ -8,10 +8,15 @@
         android:title="@string/create_new_folder"
         app:showAsAction="never"/>
 
+    <item
+        android:id="@+id/menu_item_delete_folder"
+        android:title="このフォルダを削除"
+        app:showAsAction="never"/>
+
     <item
         android:id="@+id/menu_item_add_by_media"
         android:icon="@drawable/developer_mode_24px"
-        android:title="DEBUG_メディアピッカーから新規作成"
+        android:title="DEBUG_MediaPicker"
         app:showAsAction="never"/>
 
 </menu>
\ No newline at end of file