A vehicle-side connector to be connected to a battery mounted in a vehicle, comprising: a housing configured such that a charging connector is connected thereto; a plurality of vehicle-side terminals (40A, 40B, 40C) individually accommodated into a plurality of cavities (28A, 28B, 28C) provided in the housing and configured to be individually connected to a plurality of charging terminals provided in the charging connector when the housing and the charging connector are connected; and a relay circuit unit including an electronic component with a pair of leads and having one end connected to one of the plurality of vehicle-side terminals (40A, 40B, 40C) and the other end connected to the vehicle-side terminal (40A, 40B, 40C) different from that connected to the one end out of the plurality of vehicle-side terminals (40A, 40B, 40C), characterized in that: the vehicle-side connector further comprises a retainer configured to retain the vehicle-side terminals (40A, 40B, 40C) accommodated in the cavities (28A, 28B, 28C); and the relay circuit unit is assembled in the retainer and includes a first relay terminal press-fittable into the retainer and to be connected to one of the leads in the electronic component and a second relay terminal press-fittable into the retainer and to be connected to the other lead in the electronic component; the leads are pressed by the retainer to be respectively connected to lead connecting portions provided on the first and second relay terminals when the first and second relay terminals are press-fitted; and the lead connecting portion includes a lead insertion hole through which the lead is inserted and a pair of pressure contact blades to be brought into pressure contact with the lead pushed by being pressed by the retainer. a housing configured such that a charging connector is connected thereto; a plurality of vehicle-side terminals (40A, 40B, 40C) individually accommodated into a plurality of cavities (28A, 28B, 28C) provided in the housing and configured to be individually connected to a plurality of charging terminals provided in the charging connector when the housing and the charging connector are connected; and a relay circuit unit including an electronic component with a pair of leads and having one end connected to one of the plurality of vehicle-side terminals (40A, 40B, 40C) and the other end connected to the vehicle-side terminal (40A, 40B, 40C) different from that connected to the one end out of the plurality of vehicle-side terminals (40A, 40B, 40C), the vehicle-side connector further comprises a retainer configured to retain the vehicle-side terminals (40A, 40B, 40C) accommodated in the cavities (28A, 28B, 28C); and the relay circuit unit is assembled in the retainer and includes a first relay terminal press-fittable into the retainer and to be connected to one of the leads in the electronic component and a second relay terminal press-fittable into the retainer and to be connected to the other lead in the electronic component; the leads are pressed by the retainer to be respectively connected to lead connecting portions provided on the first and second relay terminals when the first and second relay terminals are press-fitted; and the lead connecting portion includes a lead insertion hole through which the lead is inserted and a pair of pressure contact blades to be brought into pressure contact with the lead pushed by being pressed by the retainer. a lead insertion hole through which the lead is inserted and a pair of pressure contact blades to be brought into pressure contact with the lead pushed by being pressed by the retainer.