To provide a connector structure for connection between circuit boards wherein a low profile of a connector is aimed at and sinking and floating of a contact does not occur at the time of insertion and pulling-out, and to provide a connector structure in case one side is connected to a wire and the other side is mounted on a circuit board surface.

In the connector structure where a hooking piece 62b of a bending piece 62a formed on a pointed head section of a receptacle contact 6 on the basis of elastic displacement of the receptacle contact 6 is hooked on an upper step surface 56a of a seating 56 arranged on a receptacle housing 5 at the time of fitting of a connector, going-down in the fitting direction of the receptacle contact 6 is restrained by hooking the hooking piece 62b of the bending piece 62a on the upper step surface 56a of the seating 56. Further, the seating 56 can restrain going-down of the receptacle contact 6 at the time of insertion when supporting the whole contact piece 62 from a back surface, and also restrains floating of the receptacle contact 6 at the time of pulling-out.