diff --git a/briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java b/briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java
index d983479b2..37457c6a7 100644
--- a/briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java
+++ b/briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java
@@ -389,6 +389,9 @@ public class ConversationActivity extends BriarActivity
 				AliasDialogFragment.newInstance().show(
 						getSupportFragmentManager(), AliasDialogFragment.TAG);
 				return true;
+			case R.id.action_delete_all_messages:
+				askToDeleteAllMessages();
+				return true;
 			case R.id.action_social_remove_person:
 				askToRemoveContact();
 				return true;
@@ -727,6 +730,52 @@ public class ConversationActivity extends BriarActivity
 		addConversationItem(h.accept(visitor));
 	}
 
+	private void askToDeleteAllMessages() {
+		AlertDialog.Builder builder =
+				new AlertDialog.Builder(this, R.style.BriarDialogTheme);
+		builder.setTitle(getString(R.string.dialog_title_delete_all_messages));
+		builder.setMessage(
+				getString(R.string.dialog_message_delete_all_messages));
+		builder.setNegativeButton(R.string.delete,
+				(dialog, which) -> deleteAllMessages());
+		builder.setPositiveButton(R.string.cancel, null);
+		builder.show();
+	}
+
+	private void deleteAllMessages() {
+		list.showProgressBar();
+		runOnDbThread(() -> {
+			try {
+				boolean allDeleted =
+						conversationManager.deleteAllMessages(contactId);
+				reloadConversationAfterDeletingAllMessages(allDeleted);
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				runOnUiThreadUnlessDestroyed(() -> list.showData());
+			}
+		});
+	}
+
+	private void reloadConversationAfterDeletingAllMessages(
+			boolean allDeleted) {
+		runOnUiThreadUnlessDestroyed(() -> {
+			adapter.clear();
+			loadMessages();
+			if (!allDeleted) showNotAllDeletedDialog();
+		});
+	}
+
+	private void showNotAllDeletedDialog() {
+		AlertDialog.Builder builder =
+				new AlertDialog.Builder(this, R.style.BriarDialogTheme);
+		builder.setTitle(
+				getString(R.string.dialog_title_not_all_messages_deleted));
+		builder.setMessage(
+				getString(R.string.dialog_message_not_all_messages_deleted));
+		builder.setPositiveButton(R.string.ok, null);
+		builder.show();
+	}
+
 	private void askToRemoveContact() {
 		DialogInterface.OnClickListener okListener =
 				(dialog, which) -> removeContact();
diff --git a/briar-android/src/main/res/menu/conversation_actions.xml b/briar-android/src/main/res/menu/conversation_actions.xml
index e630f5a33..8447178c7 100644
--- a/briar-android/src/main/res/menu/conversation_actions.xml
+++ b/briar-android/src/main/res/menu/conversation_actions.xml
@@ -16,6 +16,11 @@
 		android:enabled="false"
 		app:showAsAction="never"/>
 
+	<item
+		android:id="@+id/action_delete_all_messages"
+		android:title="@string/delete_all_messages"
+		app:showAsAction="never"/>
+
 	<item
 		android:id="@+id/action_social_remove_person"
 		android:icon="@drawable/action_delete_white"
diff --git a/briar-android/src/main/res/values/strings.xml b/briar-android/src/main/res/values/strings.xml
index c360f2f0b..4a647c52d 100644
--- a/briar-android/src/main/res/values/strings.xml
+++ b/briar-android/src/main/res/values/strings.xml
@@ -135,6 +135,11 @@
 	<string name="set_contact_alias">Change contact name</string>
 	<string name="set_contact_alias_hint">Contact name</string>
 	<string name="set_alias_button">Change</string>
+	<string name="delete_all_messages">Delete all messages</string>
+	<string name="dialog_title_delete_all_messages">Confirm Message Deletion</string>
+	<string name="dialog_message_delete_all_messages">Are you sure that you want to delete all messages?</string>
+	<string name="dialog_title_not_all_messages_deleted">Could not delete all messages</string>
+	<string name="dialog_message_not_all_messages_deleted">Messages related to introductions or invitations can not be deleted at the moment.</string>
 	<string name="delete_contact">Delete contact</string>
 	<string name="dialog_title_delete_contact">Confirm Contact Deletion</string>
 	<string name="dialog_message_delete_contact">Are you sure that you want to remove this contact and all messages exchanged with this contact?</string>