diff --git a/browser/components/MarkdownEditor.js b/browser/components/MarkdownEditor.js
index 55e145d7..a00a87bf 100644
--- a/browser/components/MarkdownEditor.js
+++ b/browser/components/MarkdownEditor.js
@@ -3,6 +3,7 @@ import CSSModules from 'browser/lib/CSSModules'
 import styles from './MarkdownEditor.styl'
 import CodeEditor from 'browser/components/CodeEditor'
 import MarkdownPreview from 'browser/components/MarkdownPreview'
+import eventEmitter from 'browser/main/lib/eventEmitter'
 
 class MarkdownEditor extends React.Component {
   constructor (props) {
@@ -13,12 +14,16 @@ class MarkdownEditor extends React.Component {
     this.state = {
       status: 'PREVIEW',
       renderValue: props.value,
-      keyPressed: {}
+      keyPressed: {},
+      isLocked: false
     }
+
+    this.lockEditorCode = () => this.handleLockEditor()
   }
 
   componentDidMount () {
     this.value = this.refs.code.value
+    eventEmitter.on('editor:lock', this.lockEditorCode)
   }
 
   componentDidUpdate () {
@@ -33,6 +38,7 @@ class MarkdownEditor extends React.Component {
 
   componentWillUnmount () {
     this.cancelQueue()
+    eventEmitter.off('editor:lock', this.lockEditorCode)
   }
 
   queueRendering (value) {
@@ -72,11 +78,13 @@ class MarkdownEditor extends React.Component {
           this.refs.code.blur()
           this.refs.preview.focus()
         }
+        eventEmitter.emit('topbar:showlockbutton')
       })
     }
   }
 
   handleBlur (e) {
+    if (this.state.isLocked) return
     this.setState({ keyPressed: [] })
     let { config } = this.props
     if (config.editor.switchPreview === 'BLUR') {
@@ -87,6 +95,7 @@ class MarkdownEditor extends React.Component {
         this.refs.preview.focus()
         this.refs.preview.scrollTo(cursorPosition.line)
       })
+      eventEmitter.emit('topbar:showlockbutton')
     }
   }
 
@@ -102,6 +111,7 @@ class MarkdownEditor extends React.Component {
       }, () => {
         this.refs.code.focus()
       })
+      eventEmitter.emit('topbar:showlockbutton')
     }
   }
 
@@ -138,6 +148,7 @@ class MarkdownEditor extends React.Component {
     } else {
       this.refs.code.focus()
     }
+    eventEmitter.emit('topbar:showlockbutton')
   }
 
   reload () {
@@ -152,7 +163,7 @@ class MarkdownEditor extends React.Component {
     })
     this.setState({ keyPressed })
     let isNoteHandlerKey = (el) => { return this.state.keyPressed[el] }
-    if (this.state.status === 'CODE' && this.escapeFromEditor.every(isNoteHandlerKey)) {
+    if (!this.state.isLocked && this.state.status === 'CODE' && this.escapeFromEditor.every(isNoteHandlerKey)) {
       document.activeElement.blur()
     }
   }
@@ -164,6 +175,10 @@ class MarkdownEditor extends React.Component {
     this.setState({ keyPressed })
   }
 
+  handleLockEditor () {
+    this.setState({ isLocked: !this.state.isLocked })
+  }
+
   render () {
     let { className, value, config } = this.props
 
diff --git a/browser/main/Detail/MarkdownNoteDetail.js b/browser/main/Detail/MarkdownNoteDetail.js
index 65821962..8b5a15ed 100644
--- a/browser/main/Detail/MarkdownNoteDetail.js
+++ b/browser/main/Detail/MarkdownNoteDetail.js
@@ -25,15 +25,23 @@ class MarkdownNoteDetail extends React.Component {
       note: Object.assign({
         title: '',
         content: ''
-      }, props.note)
+      }, props.note),
+      editorStatus: false,
+      isLocked: false
     }
     this.dispatchTimer = null
+
+    this.showLockButton = this.handleShowLockButton.bind(this)
   }
 
   focus () {
     this.refs.content.focus()
   }
 
+  componentDidMount () {
+    ee.on('topbar:showlockbutton', this.showLockButton)
+  }
+
   componentWillReceiveProps (nextProps) {
     if (nextProps.note.key !== this.props.note.key && !this.isMovingNote) {
       if (this.saveQueue != null) this.saveNow()
@@ -50,6 +58,10 @@ class MarkdownNoteDetail extends React.Component {
     if (this.saveQueue != null) this.saveNow()
   }
 
+  componentDidUnmount () {
+    ee.off('topbar:lock', this.showLockButton)
+  }
+
   findTitle (value) {
     let splitted = value.split('\n')
     let title = null
@@ -200,10 +212,28 @@ class MarkdownNoteDetail extends React.Component {
     }
   }
 
+  handleLockButtonMouseDown (e) {
+    e.preventDefault()
+    ee.emit('editor:lock')
+    this.setState({ isLocked: !this.state.isLocked })
+  }
+
+  getToggleLockButton () {
+    return this.state.isLocked ? 'fa-lock' : 'fa-unlock-alt'
+  }
+
   handleDeleteKeyDown (e) {
     if (e.keyCode === 27) this.handleDeleteCancelButtonClick(e)
   }
 
+  handleShowLockButton () {
+    this.setState({editorStatus: this.refs.content.state.status})
+  }
+
+  handleFocus (e) {
+    this.focus()
+  }
+
   render () {
     let { data, config } = this.props
     let { note } = this.state
@@ -235,6 +265,19 @@ class MarkdownNoteDetail extends React.Component {
             />
           </div>
           <div styleName='info-right'>
+            {(() => {
+              const faClassName=`fa ${this.getToggleLockButton()}`
+              const lockButtonComponent =
+                <button styleName='info-right-button'
+                  onFocus={(e) => this.handleFocus(e)}
+                  onMouseDown={(e) => this.handleLockButtonMouseDown(e)}
+                >
+                  <i className={faClassName}/>
+                </button>
+              return (
+                this.state.editorStatus === 'CODE' ? lockButtonComponent : ''
+              )
+            })()}
             <button styleName='info-right-button'
               onClick={(e) => this.handleContextButtonClick(e)}
             >