diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0e9d090..db58b39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 - Update Spigot API to 1.20.1
 - Update Java compile target version to 17
 - Stop providing technical support for legacy Spigot (prior to Spigot 1.20)
+- Show `/bm help` info when providing invalid arguments to `/bm`
 - [Experimental] Add `/bm view` command for banner sharing
 
 ## v2.3.2 (for 1.17.x)
diff --git a/CHANGELOG.zh-tw.md b/CHANGELOG.zh-tw.md
index bae9a1a..54bdead 100644
--- a/CHANGELOG.zh-tw.md
+++ b/CHANGELOG.zh-tw.md
@@ -6,6 +6,7 @@
 - 更新 Spigot API 至 1.20.1
 - 更新 Java 編譯目標版本至 17
 - 停止為舊版 Spigot 提供技術支援（1.20 之前的版本）
+- 當使用 `/bm`，但參數無效時，顯示 `/bm help` 的資訊
 - 【實驗性功能】新增 `/bm view` 指令，用於分享旗幟
 
 
diff --git a/src/main/java/club/kid7/bannermaker/command/BannerMakerCommand.java b/src/main/java/club/kid7/bannermaker/command/BannerMakerCommand.java
index e3c588a..efe7185 100644
--- a/src/main/java/club/kid7/bannermaker/command/BannerMakerCommand.java
+++ b/src/main/java/club/kid7/bannermaker/command/BannerMakerCommand.java
@@ -3,6 +3,7 @@
 import club.kid7.bannermaker.BannerMaker;
 import club.kid7.bannermaker.customMenu.MainMenu;
 import club.kid7.pluginutilities.command.CommandComponent;
+import club.kid7.pluginutilities.command.exception.CommandExecuteException;
 import club.kid7.pluginutilities.gui.CustomGUIManager;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
@@ -31,7 +32,11 @@ public BannerMakerCommand(BannerMaker bm) {
 
 
     @Override
-    public boolean executeCommand(CommandSender sender, Command cmd, String label, String[] args) {
+    public boolean executeCommand(CommandSender sender, Command cmd, String label, String[] args) throws CommandExecuteException {
+        if (args.length > 0) {
+            // 無效指令，顯示 help
+            return getSubCommands().get("help").executeCommand(sender, cmd, label, args);
+        }
         Player player = (Player) sender;
         //開啟選單
         CustomGUIManager.openPrevious(player, MainMenu.class);