A mobile terminal and controlling method thereof are disclosed, which enables a user to keep watching contents via a communication-connected external device by transmitting real-time video data displayed on a play region to the external device despite that the play region in part disappears from a screen including the play region of the content.The present invention includes a display unit configured to display a screen including a play region for at least one content, a wireless communication unit configured to establish wireless communication with at least one external device, the wireless communication unit configured to transmit video data displayed on the play region to the at least one external device in order to display the transmitted video data, a controller configured to control the wireless communication unit to transmit the video data to the at least one external device in real time if a portion of the play region disappears from the screen in response to a scroll of the screen.