diff --git a/front_end/elements/StylesSidebarPane.js b/front_end/elements/StylesSidebarPane.js
index 7b777ae6d7..d6bb4dc698 100644
--- a/front_end/elements/StylesSidebarPane.js
+++ b/front_end/elements/StylesSidebarPane.js
@@ -1109,6 +1109,16 @@ export class StylePropertiesSection {
     const closeBrace = this._innerElement.createChild('div', 'sidebar-pane-closing-brace');
     closeBrace.textContent = '}';
 
+    if (this._style.parentRule) {
+      const newRuleButton =
+          new UI.Toolbar.ToolbarButton(Common.UIString.UIString('Insert Style Rule Below'), 'largeicon-add');
+      newRuleButton.addEventListener(UI.Toolbar.ToolbarButton.Events.Click, this._onNewRuleClick, this);
+      newRuleButton.element.tabIndex = -1;
+      const expandToolbar = new UI.Toolbar.Toolbar('sidebar-pane-section-toolbar', this._innerElement);
+      expandToolbar.appendToolbarItem(newRuleButton);
+      UI.ARIAUtils.markAsHidden(expandToolbar.element);
+    }
+
     this._selectorElement.addEventListener('click', this._handleSelectorClick.bind(this), false);
     this.element.addEventListener('mousedown', this._handleEmptySpaceMouseDown.bind(this), false);
     this.element.addEventListener('click', this._handleEmptySpaceClick.bind(this), false);
@@ -1430,6 +1440,17 @@ export class StylePropertiesSection {
     return curElement ? curElement._section : null;
   }
 
+  /**
+   * @param {!Common.EventTarget.EventTargetEvent} event
+   */
+  _onNewRuleClick(event) {
+    event.data.consume();
+    const rule = this._style.parentRule;
+    const range =
+        TextUtils.TextRange.TextRange.createFromLocation(rule.style.range.endLine, rule.style.range.endColumn + 1);
+    this._parentPane._addBlankSection(this, /** @type {string} */ (rule.styleSheetId), range);
+  }
+
   /**
    * @param {!SDK.CSSModel.Edit} edit
    */
diff --git a/front_end/elements/elements_strings.grdp b/front_end/elements/elements_strings.grdp
index 500a46d20d..1fabdd267d 100644
--- a/front_end/elements/elements_strings.grdp
+++ b/front_end/elements/elements_strings.grdp
@@ -249,6 +249,9 @@
   <message name="IDS_DEVTOOLS_abdf882c25e08d9ba219fe33f17591fe" desc="Link text content in Elements Tree Outline of the Elements panel">
     reveal
   </message>
+  <message name="IDS_DEVTOOLS_ad4ac01e4a5688063dace5ba5d0f04de" desc="Tooltip text that appears when hovering over the largeicon add button in the Styles Sidebar Pane of the Elements panel">
+    Insert Style Rule Below
+  </message>
   <message name="IDS_DEVTOOLS_b0351810a5721f657b088608865849dd" desc="Text in Styles Sidebar Pane of the Elements panel">
     via inspector
   </message>