PURPOSE: To provide a joint connector designed for the use solely for grounding electrical fittings of a car, etc., in a lump, wherein the structure of the connector allows suppressing the cost requiring no larger space.

CONSTITUTION: A joint connector designed for the use solely for grounding the electrical fittings of a car, etc., is composed of a connector 3 whose recessed contacts are connected to electric wires 1 whose other ends are connected with the ground connection parts of electrical fittings to be grounded, and a bus bar 6 consisting of a plurality of protrusive contacts 7 to be coupled electrically with the recessed contacts and a ground terminal 9 to be fixed directly to an earth member of a car body, etc., wherein the protrusive contacts 7 and ground terminal 9 are formed from a metal material in a single piece structure. Even in the case an influenced of vibrations, etc., is applied in the condition that the recessed contacts are coupled with the protrusive contacts 7, the coupling condition is ensured through provision of a locking means (projection 5 and lock piece 8).