A connector (27) is adapted to be connected to a circuit board (23) and has an insulating housing (41) adapted to be mounted to one end portion of the circuit board. The housing is provided with conductive contacts (42) each having a shape along the housing. The housing has first and second portions (51, 52) that respectively face both surfaces of the circuit board when the housing is mounted to the circuit board, and a joining portion (54) joining the first and second portions together. The contacts are insulated from the circuit board in the joining portion and are exposed in the first portion so as to be capable of contacting the surface of the circuit board.