PURPOSE: To quickly and easily connect by switching a high frequency unit to an antenna and a tester, respectively and to constitute a device as the one of small size, light weight and with low cost.

CONSTITUTION: A connector 1 with switch function is constituted by fixing by out-fitting a grounding cylinder lb in an insulator sleeve la, forming the center hole of the insulator sleeve la in an elongated square hole 1d and arranging a movable contact piece lg consisting of a fixed contact 1f and a U or V-shape leaf spring in the square hole 1d. When a connector plug 2 for tester connection is inserted to the connector 1, the movable contact piece 1g electrically communicated with the exciter feed terminal 22b of an antenna circuit is energized by switching to the tester, and it is returned to an original state by extracting the connector plug 2.