The present invention relates to a joint connector assembly. The invention consists of a joint connector 10 and the mating connector 30, the joint connector 10 is provided with coupling boss 13 has a circular in cross-section therein, the inner space (11 '), the other and electrically connecting the first terminal 20, a plurality of terminal portions 22 is formed to be seated along the outer circumferential surface of the coupling boss 13 is inserted. And, in the interior of the mating connector 30 is coupled space (31 ') having a peripheral surface and a corresponding inner surface of the coupling boss 13 is formed so as to be rotatable relative coupled with the joint connector 10, the first first terminal 22 and each of the plurality of second terminals are connected (40) is provided along the inner circumference of the coupling space (31 ') through the first relative rotation between the joint connector 10 of the terminal 20 and second terminals (20,40) are connected to each other selectively.
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