A head mounted display includes: a display configured to display an image; a shutter configured to block light incident on an eye; a controller configured to control the display to display a left eye image and a right eye image using half or more of a region of the display in a horizontal direction and to control the shutter based on the image displayed on the display; and a lens configured to focus light output from the display such that the left eye image and the right eye image displayed on the display are viewed by a left eye and a right eye respectively.