Switch device

Switch device (35) for use by an operator and connection to an actuator (18), for enabling the actuator to be driven when an ID code transmitted from a transponder (25) of a portable device (20) matches a predetermined ID code of a vehicle controller (10), the switch device comprising: an operation switch (30) operated by the operator for driving the actuator; and a decorative member (32) arranged to surround the operation switch; the switch device having communication means (17) arranged adjacent to the decorative member for transmitting a transponder-driving radio wave that causes the transponder to generate electromotive force used to transmit the ID code; and a ferromagnetic body (45), arranged between the communication means and the decorative member, for amplifying the transponder-driving radio wave.