As a structure for electrically connecting conductors of a flat cable (flat wire member) with a circuit board, an end of the flat cable is split into split pieces, and connectors (second connectors) are mounted at the ends of the respective split pieces. A connector (first connector) provided with two connecting portions for the connectors are mounted on the circuit board. When the respective connectors mounted on the flat cable are connected with the connector, the respective conductors of the split pieces are brought into contact with terminals accommodated in the connector. The flat cable or the flat wire member can be easily and securely connected.