diff --git a/arduino-ide-extension/src/browser/arduino-ide-frontend-module.ts b/arduino-ide-extension/src/browser/arduino-ide-frontend-module.ts
index 622819e6..5c6c2bde 100644
--- a/arduino-ide-extension/src/browser/arduino-ide-frontend-module.ts
+++ b/arduino-ide-extension/src/browser/arduino-ide-frontend-module.ts
@@ -321,6 +321,8 @@ import { MonacoThemeServiceIsReady } from './utils/window';
 import { Deferred } from '@theia/core/lib/common/promise-util';
 import { StatusBarImpl } from './theia/core/status-bar';
 import { StatusBarImpl as TheiaStatusBarImpl } from '@theia/core/lib/browser';
+import { EditorMenuContribution } from './theia/editor/editor-file';
+import { EditorMenuContribution as TheiaEditorMenuContribution } from '@theia/editor/lib/browser/editor-menu';
 
 const registerArduinoThemes = () => {
   const themes: MonacoThemeJson[] = [
@@ -640,6 +642,10 @@ export default new ContainerModule((bind, unbind, isBound, rebind) => {
   bind(WindowContribution).toSelf().inSingletonScope();
   rebind(TheiaWindowContribution).toService(WindowContribution);
 
+  // To remove `File` > `Close Editor`.
+  bind(EditorMenuContribution).toSelf().inSingletonScope();
+  rebind(TheiaEditorMenuContribution).toService(EditorMenuContribution);
+
   bind(ArduinoDaemon)
     .toDynamicValue((context) =>
       WebSocketConnectionProvider.createProxy(
diff --git a/arduino-ide-extension/src/browser/theia/editor/editor-file.ts b/arduino-ide-extension/src/browser/theia/editor/editor-file.ts
new file mode 100644
index 00000000..721a7783
--- /dev/null
+++ b/arduino-ide-extension/src/browser/theia/editor/editor-file.ts
@@ -0,0 +1,12 @@
+import { MenuModelRegistry } from '@theia/core';
+import { CommonCommands } from '@theia/core/lib/browser';
+import { injectable } from '@theia/core/shared/inversify';
+import { EditorMenuContribution as TheiaEditorMenuContribution } from '@theia/editor/lib/browser/editor-menu';
+
+@injectable()
+export class EditorMenuContribution extends TheiaEditorMenuContribution {
+  override registerMenus(registry: MenuModelRegistry): void {
+    super.registerMenus(registry);
+    registry.unregisterMenuAction(CommonCommands.CLOSE_MAIN_TAB.id);
+  }
+}