Ajoint connector comprising: a connector housing that defines a fitting space for a mating connector by a back wall and a hood wall extending forward from the back wall ; a circuit board that is fixed to a housing body to which the connector housing is detachably attached, and that is located behind the back wall of the connector housing through a component space when the connector housing is attached to the housing body ; an independent terminal in which a terminal portion at a distal end penetrates the back wall (11a, 11 1a) of the connector housing and protrudes into the fitting space to serve as a connector terminal when a proximal end is joined to a circuit conductor of the circuit board and the connector housing is attached to the housing body ; a relay terminal , characterized in that : the relay terminal has a proximal end joined to the circuit conductor of the circuit board ; and the joint connector further includes a joint terminal including: a bridge portion fixed to the back wall of the connector housing ; a plurality of terminal portions extending forward from the bridge portion in a state of being conductive to each other by the bridge portion and protruding into the fitting space of the connector housing to serve as connector terminals; and one contact conduction piece that extends from the bridge portion to the back of the back wall of the connector housing and is elastically brought into conductive contact with the relay terminal via an elastic deformation portion when the connector housing is attached to the housing body . a connector housing that defines a fitting space for a mating connector by a back wall and a hood wall extending forward from the back wall ; a circuit board that is fixed to a housing body to which the connector housing is detachably attached, and that is located behind the back wall of the connector housing through a component space when the connector housing is attached to the housing body ; an independent terminal in which a terminal portion at a distal end penetrates the back wall (11a, 11 1a) of the connector housing and protrudes into the fitting space to serve as a connector terminal when a proximal end is joined to a circuit conductor of the circuit board and the connector housing is attached to the housing body ; a relay terminal , the relay terminal has a proximal end joined to the circuit conductor of the circuit board ; and the joint connector further includes a joint terminal including: a bridge portion fixed to the back wall of the connector housing ; a plurality of terminal portions extending forward from the bridge portion in a state of being conductive to each other by the bridge portion and protruding into the fitting space of the connector housing to serve as connector terminals; and one contact conduction piece that extends from the bridge portion to the back of the back wall of the connector housing and is elastically brought into conductive contact with the relay terminal via an elastic deformation portion when the connector housing is attached to the housing body . a bridge portion fixed to the back wall of the connector housing ; a plurality of terminal portions extending forward from the bridge portion in a state of being conductive to each other by the bridge portion and protruding into the fitting space of the connector housing to serve as connector terminals; and one contact conduction piece that extends from the bridge portion to the back of the back wall of the connector housing and is elastically brought into conductive contact with the relay terminal via an elastic deformation portion when the connector housing is attached to the housing body . <EOS>