diff --git a/packages/notebook/src/browser/contributions/notebook-actions-contribution.ts b/packages/notebook/src/browser/contributions/notebook-actions-contribution.ts
index 00ae102716ac7..4b00c42f13d5c 100644
--- a/packages/notebook/src/browser/contributions/notebook-actions-contribution.ts
+++ b/packages/notebook/src/browser/contributions/notebook-actions-contribution.ts
@@ -286,6 +286,8 @@ export class NotebookActionsContribution implements CommandContribution, MenuCon
             order: '30',
             when: NOTEBOOK_HAS_OUTPUTS
         });
+
+        menus.registerIndependentSubmenu(NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_HIDDEN_ITEMS_CONTEXT_MENU, '');
     }
 
     registerKeybindings(keybindings: KeybindingRegistry): void {
@@ -326,4 +328,5 @@ export namespace NotebookMenus {
     export const NOTEBOOK_MAIN_TOOLBAR = 'notebook/toolbar';
     export const NOTEBOOK_MAIN_TOOLBAR_CELL_ADD_GROUP = [NOTEBOOK_MAIN_TOOLBAR, 'cell-add-group'];
     export const NOTEBOOK_MAIN_TOOLBAR_EXECUTION_GROUP = [NOTEBOOK_MAIN_TOOLBAR, 'cell-execution-group'];
+    export const NOTEBOOK_MAIN_TOOLBAR_HIDDEN_ITEMS_CONTEXT_MENU = 'notebook-main-toolbar-hidden-items-context-menu';
 }
diff --git a/packages/notebook/src/browser/style/index.css b/packages/notebook/src/browser/style/index.css
index ce8afa1a658b4..5fd8ce1e2f904 100644
--- a/packages/notebook/src/browser/style/index.css
+++ b/packages/notebook/src/browser/style/index.css
@@ -225,6 +225,7 @@
 
 .theia-notebook-main-toolbar-item-text {
   padding: 0 4px;
+  white-space: nowrap;
 }
 
 .theia-notebook-toolbar-separator {
diff --git a/packages/notebook/src/browser/view/notebook-main-toolbar.tsx b/packages/notebook/src/browser/view/notebook-main-toolbar.tsx
index 696bb496232a5..f3d20a1eb63c7 100644
--- a/packages/notebook/src/browser/view/notebook-main-toolbar.tsx
+++ b/packages/notebook/src/browser/view/notebook-main-toolbar.tsx
@@ -15,7 +15,7 @@
 // *****************************************************************************
 import { ArrayUtils, CommandRegistry, CompoundMenuNodeRole, DisposableCollection, MenuModelRegistry, MenuNode, nls } from '@theia/core';
 import * as React from '@theia/core/shared/react';
-import { codicon } from '@theia/core/lib/browser';
+import { codicon, ContextMenuRenderer } from '@theia/core/lib/browser';
 import { NotebookCommands, NotebookMenus } from '../contributions/notebook-actions-contribution';
 import { NotebookModel } from '../view-model/notebook-model';
 import { NotebookKernelService } from '../service/notebook-kernel-service';
@@ -32,6 +32,7 @@ export interface NotebookMainToolbarProps {
     contextKeyService: ContextKeyService;
     editorNode: HTMLElement;
     notebookContextManager: NotebookContextManager;
+    contextMenuRenderer: ContextMenuRenderer;
 }
 
 @injectable()
@@ -41,6 +42,7 @@ export class NotebookMainToolbarRenderer {
     @inject(MenuModelRegistry) protected readonly menuRegistry: MenuModelRegistry;
     @inject(ContextKeyService) protected readonly contextKeyService: ContextKeyService;
     @inject(NotebookContextManager) protected readonly notebookContextManager: NotebookContextManager;
+    @inject(ContextMenuRenderer) protected readonly contextMenuRenderer: ContextMenuRenderer;
 
     render(notebookModel: NotebookModel, editorNode: HTMLElement): React.ReactNode {
         return <NotebookMainToolbar notebookModel={notebookModel}
@@ -49,11 +51,20 @@ export class NotebookMainToolbarRenderer {
             commandRegistry={this.commandRegistry}
             contextKeyService={this.contextKeyService}
             editorNode={editorNode}
-            notebookContextManager={this.notebookContextManager} />;
+            notebookContextManager={this.notebookContextManager}
+            contextMenuRenderer={this.contextMenuRenderer} />;
     }
 }
 
-export class NotebookMainToolbar extends React.Component<NotebookMainToolbarProps, { selectedKernelLabel?: string }> {
+interface NotebookMainToolbarState {
+    selectedKernelLabel?: string;
+    numberOfHiddenItems: number;
+}
+
+export class NotebookMainToolbar extends React.Component<NotebookMainToolbarProps, NotebookMainToolbarState> {
+
+    // The minimum area between items and kernel select before hiding items in a context menu
+    static readonly MIN_FREE_AREA = 10;
 
     protected toDispose = new DisposableCollection();
 
@@ -61,10 +72,18 @@ export class NotebookMainToolbar extends React.Component<NotebookMainToolbarProp
         NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_CELL_ADD_GROUP[NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_CELL_ADD_GROUP.length - 1],
         NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_EXECUTION_GROUP[NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_EXECUTION_GROUP.length - 1]];
 
+    protected gapElement: HTMLDivElement | undefined;
+    protected lastGapElementWidth: number = 0;
+
+    protected resizeObserver: ResizeObserver = new ResizeObserver(() => this.calculateItemsToHide());
+
     constructor(props: NotebookMainToolbarProps) {
         super(props);
 
-        this.state = { selectedKernelLabel: props.notebookKernelService.getSelectedOrSuggestedKernel(props.notebookModel)?.label };
+        this.state = {
+            selectedKernelLabel: props.notebookKernelService.getSelectedOrSuggestedKernel(props.notebookModel)?.label,
+            numberOfHiddenItems: 0,
+        };
         this.toDispose.push(props.notebookKernelService.onDidChangeSelectedKernel(event => {
             if (props.notebookModel.uri.isEqual(event.notebook)) {
                 this.setState({ selectedKernelLabel: props.notebookKernelService.getKernel(event.newKernel ?? '')?.label });
@@ -97,10 +116,49 @@ export class NotebookMainToolbar extends React.Component<NotebookMainToolbarProp
         this.toDispose.dispose();
     }
 
+    override componentDidUpdate(): void {
+        this.calculateItemsToHide();
+    }
+
+    override componentDidMount(): void {
+        this.calculateItemsToHide();
+    }
+
+    protected calculateItemsToHide(): void {
+        const numberOfMenuItems = this.getMenuItems().length;
+        if (this.gapElement && this.gapElement.getBoundingClientRect().width < NotebookMainToolbar.MIN_FREE_AREA && this.state.numberOfHiddenItems < numberOfMenuItems) {
+            this.setState({ ...this.state, numberOfHiddenItems: this.state.numberOfHiddenItems + 1 });
+            this.lastGapElementWidth = this.gapElement.getBoundingClientRect().width;
+        } else if (this.gapElement && this.gapElement.getBoundingClientRect().width > this.lastGapElementWidth && this.state.numberOfHiddenItems > 0) {
+            this.setState({ ...this.state, numberOfHiddenItems: 0 });
+            this.lastGapElementWidth = this.gapElement.getBoundingClientRect().width;
+        }
+    }
+
+    protected renderContextMenu(event: MouseEvent, menuItems: readonly MenuNode[]): void {
+        const hiddenItems = menuItems.slice(menuItems.length - this.calculateNumberOfHiddenItems(menuItems));
+        const contextMenu = this.props.menuRegistry.getMenu([NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_HIDDEN_ITEMS_CONTEXT_MENU]);
+
+        contextMenu.children.map(item => item.id).forEach(id => contextMenu.removeNode(id));
+        hiddenItems.forEach(item => contextMenu.addNode(item));
+
+        this.props.contextMenuRenderer.render({
+            anchor: event,
+            menuPath: [NotebookMenus.NOTEBOOK_MAIN_TOOLBAR_HIDDEN_ITEMS_CONTEXT_MENU],
+            context: this.props.editorNode,
+            args: [this.props.notebookModel.uri]
+        });
+    }
+
     override render(): React.ReactNode {
+        const menuItems = this.getMenuItems();
         return <div className='theia-notebook-main-toolbar'>
-            {this.getMenuItems().map(item => this.renderMenuItem(item))}
-            <div style={{ flexGrow: 1 }}></div>
+            {menuItems.slice(0, menuItems.length - this.calculateNumberOfHiddenItems(menuItems)).map(item => this.renderMenuItem(item))}
+            {
+                this.state.numberOfHiddenItems > 0 &&
+                <span className={`${codicon('ellipsis')} action-label theia-notebook-main-toolbar-item`} onClick={e => this.renderContextMenu(e.nativeEvent, menuItems)} />
+            }
+            <div ref={element => this.gapElementChanged(element)} style={{ flexGrow: 1 }}></div>
             <div className='theia-notebook-main-toolbar-item action-label'
                 onClick={() => this.props.commandRegistry.executeCommand(NotebookCommands.SELECT_KERNEL_COMMAND.id, this.props.notebookModel)}>
                 <span className={codicon('server-environment')} />
@@ -108,7 +166,18 @@ export class NotebookMainToolbar extends React.Component<NotebookMainToolbarProp
                     {this.state.selectedKernelLabel ?? nls.localizeByDefault('Select Kernel')}
                 </span>
             </div>
-        </div>;
+        </div >;
+    }
+
+    protected gapElementChanged(element: HTMLDivElement | null): void {
+        if (this.gapElement) {
+            this.resizeObserver.unobserve(this.gapElement);
+        }
+        this.gapElement = element ?? undefined;
+        if (this.gapElement) {
+            this.lastGapElementWidth = this.gapElement.getBoundingClientRect().width;
+            this.resizeObserver.observe(this.gapElement);
+        }
     }
 
     protected renderMenuItem(item: MenuNode, submenu?: string): React.ReactNode {
@@ -157,4 +226,10 @@ export class NotebookMainToolbar extends React.Component<NotebookMainToolbarProp
         menus.filter(item => item.children && item.children.length > 0)
             .forEach(item => this.getAllContextKeys(item.children!, keySet));
     }
+
+    protected calculateNumberOfHiddenItems(allMenuItems: readonly MenuNode[]): number {
+        return this.state.numberOfHiddenItems >= allMenuItems.length ?
+            allMenuItems.length :
+            this.state.numberOfHiddenItems % allMenuItems.length;
+    }
 }