A door mirror device includes an antenna and a metal frame for attaching parts. The antenna is capable of at least one of receiving radio transmissions from the outside of a vehicle cabin or transmitting radio transmissions to the outside of the vehicle cabin. The antenna includes a plate and a case that are electrically continuous with a matching-use base plate. The plate and the case of the antenna are fixed to the frame by a tapping screw. The antenna is grounded to the frame as a result of the plate becoming electrically continuous with the frame via the tapping screw.