diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
index 092c280a..bc01c594 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/activities/ThreadActivity.kt
@@ -92,6 +92,7 @@ class ThreadActivity : SimpleActivity() {
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         when (item.itemId) {
+            R.id.block_number -> blockNumber()
             R.id.delete -> askConfirmDelete()
             R.id.manage_people -> managePeople()
             else -> return super.onOptionsItemSelected(item)
@@ -151,6 +152,10 @@ class ThreadActivity : SimpleActivity() {
         }
     }
 
+    private fun blockNumber() {
+
+    }
+
     private fun askConfirmDelete() {
         ConfirmationDialog(this, getString(R.string.delete_whole_conversation_confirmation)) {
             deleteThread(threadId)
diff --git a/app/src/main/res/drawable/ic_block_vector.xml b/app/src/main/res/drawable/ic_block_vector.xml
new file mode 100644
index 00000000..d5941307
--- /dev/null
+++ b/app/src/main/res/drawable/ic_block_vector.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFF"
+        android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM4,12c0,-4.42 3.58,-8 8,-8 1.85,0 3.55,0.63 4.9,1.69L5.69,16.9C4.63,15.55 4,13.85 4,12zM12,20c-1.85,0 -3.55,-0.63 -4.9,-1.69L18.31,7.1C19.37,8.45 20,10.15 20,12c0,4.42 -3.58,8 -8,8z" />
+</vector>
diff --git a/app/src/main/res/menu/menu_thread.xml b/app/src/main/res/menu/menu_thread.xml
index e1f68c30..475c8cdc 100644
--- a/app/src/main/res/menu/menu_thread.xml
+++ b/app/src/main/res/menu/menu_thread.xml
@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/block_number"
+        android:icon="@drawable/ic_block_vector"
+        android:title="@string/block_number"
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/delete"
         android:icon="@drawable/ic_delete_vector"