An embodiment relates to an electronic device which comprises a case and a mobile terminal comprising a terminal body. A connection port provided on one side of the terminal body, a controller and a first display part the electronic device comprising: a second display part for displaying a game executed in the mobile terminal; and a wiring part for electrically connecting a first body and a second body. Wherein the controller controls the first display part and second display part, such that an integrated display part comprising the first display part and second display part is formed, and divides a first image such that the first image displayed on the first display part is displayed on the integrated display part in a divided manner, the first image comprises a first sub-image and a second sub-image, and the first image and second sub-image comprise images overlapping each other.