A switch device comprising: a communication sheet that propagates electromagnetic wave; a wireless communication part (102, 1022, 1024, 1026, 1028) arranged close to said communication sheet, and stores predetermined information, and wirelessly transmits said predetermined information to the communication sheet; a shield part that shields a radio signal wirelessly transmitted from said wireless communication part (102, 1022, 1024, 1026, 1028); an operation part that enables or disables wireless communication between said communication sheet and said wireless communication part (102, 1022, 1024, 1026, 1028); and a discrimination part that discriminates contents of operation by said operation part based on the predetermined information wirelessly transmitted by said wireless communication part (102, 1022, 1024, 1026, 1028), wherein said shield part is arranged between said communication sheet and said wireless communication part (102, 1022, 1024, 1026, 1028); according to an operation by said operation part to disable the wireless communication between said communication sheet and said wireless communication part (102, 1022, 1024, 1026, 1028), said shield part, said communication sheet or said wireless communication part (102, 1022, 1024, 1026, 1028) slides and shields the radio signal from said wireless communication part (102, 1022, 1024, 1026, 1028); the wireless communication part (102, 1022, 1024, 1026, 1028) and the shield part have a flat shape and are arranged parallel to the communication sheet; and a direction of relative movement of the shield part is parallel to the communication sheet. a communication sheet that propagates electromagnetic wave; a wireless communication part (102, 1022, 1024, 1026, 1028) arranged close to said communication sheet, and stores predetermined information, and wirelessly transmits said predetermined information to the communication sheet; a shield part that shields a radio signal wirelessly transmitted from said wireless communication part (102, 1022, 1024, 1026, 1028); an operation part that enables or disables wireless communication between said communication sheet and said wireless communication part (102, 1022, 1024, 1026, 1028); and a discrimination part that discriminates contents of operation by said operation part based on the predetermined information wirelessly transmitted by said wireless communication part (102, 1022, 1024, 1026, 1028), wherein said shield part is arranged between said communication sheet and said wireless communication part (102, 1022, 1024, 1026, 1028); according to an operation by said operation part to disable the wireless communication between said communication sheet and said wireless communication part (102, 1022, 1024, 1026, 1028), said shield part, said communication sheet or said wireless communication part (102, 1022, 1024, 1026, 1028) slides and shields the radio signal from said wireless communication part (102, 1022, 1024, 1026, 1028); the wireless communication part (102, 1022, 1024, 1026, 1028) and the shield part have a flat shape and are arranged parallel to the communication sheet; and a direction of relative movement of the shield part is parallel to the communication sheet.