Joint Connector and Method for Manufacturing Joint Connector

There is provided a joint connector including: a ground terminal member made of a conductive metal, and configured by integrally forming a plate-shaped fixing portion fixed to a ground portion, the body horizontal plate portion extending from the plate-shaped fixing portion, the body rising plate portion formed by bending the body horizontal plate portion in a rising direction at a bent portion, the terminal connection portion provided above the body rising plate portion, and the crank-shaped bent portion bent in a crank shape near the terminal connection portion in the body rising plate portion; a housing to which the ground terminal member is insert-molded; and a primer treatment portion applied to an outer peripheral surface of the body rising plate portion on a side of the body horizontal plate portion with respect to the crank-shaped bent portion.