An input device 100 is structured such that a flexible display 102 is connected with a keyboard 1 through a control part disposed in a housing unit 101 only during use of the input device 100, in which a contact terminal 105 in the flexible display 102 is connected with a contact terminal 104 in a connector 103 which is electrically connected with a first and second keyboard units 3 and 4 when the flexible display 102 is drawn upward from the housing unit 101 through a slot 118 when required for use of the input device 100.