A wiring structure to supply power to a license light provided in a two-wheeled vehicle includes a wire, a connector, a vehicle-body-side harness, and a plug. The wire is connected to the license light attached to a fender support. The fender support is attached to a back surface of a rear fender which is detachably attached to a vehicle body. The connector is attached to a leading end of the wire and to the fender support. The vehicle-body-side harness is fastened to a vehicle-body frame with a fastener at a position lower than an attachment position of the connector. The vehicle-body-side harness extends upward toward the connector. The plug is provided to the vehicle-body-side harness and is connected to the connector to supply power from the vehicle body to the license light.