To simplify handling of an induction heat generation roller device by making a lead wire, necessary for connecting an induction coil to an excitation power source thereof, to be non-obstacle in transporting and the like.

A relay box is fixed to an end which is extracted to the outside of a support rod supporting an induction heat generation mechanism. A receptacle of a connector is installed on the surface of the relay box. The lead wires connected to an induction coil are connected to the receptacle respectively. A plug connected to the receptacle by a pin is detachably provided. A power source wire connected to an excitation power source is connected to the plug.