diff --git a/common/changes/office-ui-fabric-react/bugs-3858-clear-search-arialabel-ariadescription_2018-02-12-10-52.json b/common/changes/office-ui-fabric-react/bugs-3858-clear-search-arialabel-ariadescription_2018-02-12-10-52.json
new file mode 100644
index 0000000000000..ef168edc60c71
--- /dev/null
+++ b/common/changes/office-ui-fabric-react/bugs-3858-clear-search-arialabel-ariadescription_2018-02-12-10-52.json
@@ -0,0 +1,9 @@
+{
+  "changes": [{
+    "packageName": "office-ui-fabric-react",
+    "comment": "Add clearButtonProps prop to SearchBox.types.ts with the IButtonPropsType. This is passed to the icon button in SearchBox.base.tsx",
+    "type": "minor"
+  }],
+  "packageName": "office-ui-fabric-react",
+  "email": "cohoov@microsoft.com"
+}
\ No newline at end of file
diff --git a/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.base.tsx b/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.base.tsx
index b1f33e8e3512b..46ccda1ed9abd 100644
--- a/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.base.tsx
+++ b/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.base.tsx
@@ -54,7 +54,7 @@ export class SearchBoxBase extends BaseComponent<ISearchBoxProps, ISearchBoxStat
   }
 
   public render() {
-    let { labelText, className, disabled, underlined, getStyles, theme } = this.props;
+    let { labelText, className, disabled, underlined, getStyles, theme, clearButtonProps } = this.props;
     let { value, hasFocus, id } = this.state;
 
     const classNames = getClassNames(getStyles!, {
@@ -89,7 +89,12 @@ export class SearchBoxBase extends BaseComponent<ISearchBoxProps, ISearchBoxStat
         />
         { value!.length > 0 &&
           <div className={ classNames.clearButton }>
-            <IconButton styles={ { root: { height: 'auto' }, icon: { fontSize: '12px' } } } onClick={ this._onClearClick } iconProps={ { iconName: 'Clear' } } />
+            <IconButton
+              styles={ { root: { height: 'auto' }, icon: { fontSize: '12px' } } }
+              onClick={ this._onClearClick }
+              iconProps={ { iconName: 'Clear' } }
+              { ...clearButtonProps }
+            />
           </div>
         }
       </div>
diff --git a/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.types.ts b/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.types.ts
index 37d87853caa1f..92019602a7fb3 100644
--- a/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.types.ts
+++ b/packages/office-ui-fabric-react/src/components/SearchBox/SearchBox.types.ts
@@ -1,6 +1,7 @@
 import * as React from 'react';
 import { ITheme, IStyle } from '../../Styling';
 import { IStyleFunction } from '../../Utilities';
+import { IButtonProps } from '../Button';
 
 export interface ISearchBox {
   /**
@@ -64,6 +65,11 @@ export interface ISearchBoxProps extends React.InputHTMLAttributes<HTMLInputElem
    */
   ariaLabel?: string;
 
+  /**
+   * The props for the clear button.
+   */
+  clearButtonProps?: IButtonProps;
+
   /**
    * Whether or not the SearchBox is underlined.
    * @default false