There is disclosed a polio case including a back cover coupled to a rear surface of a mobile terminal, a quick cover connected to a predetermined portion of the back cover, to cover a front surface of the mobile terminal, a touch unit provided in an inner portion of the quick cover, the touch unit formed of a conductive material, wherein a touch sensor provided in the front surface of the mobile terminal contacts with the touch unit, when the quick cover is closed, and capacity of the touch sensor changes. The polio case may provide the display unit with a screen matching a shape of the quick cover.