A cover device is disclosed, and includes a cover member having an output unit on a surface thereof, and rotatably coupled with a touch panel; and an electrostatic capacitance generating unit which varies electrostatic capacitance at a touch position of the touch panel according to a touch on the output unit. A cover device also includes an output unit; and a transparent conductive film member provided on front and rear surfaces of the output unit, such that the transparent conductive film member is folded and provided on the front and rear surfaces of the output unit, so as to generate electrostatic capacitance at the same position.