A contact is formed of paired contact pieces, a coupling part coupling the contact pieces, and a connecting part extended from the coupling part, and the connecting part has a plate surface lowered by one step from the coupling part in a direction in which the contact pieces project. A body includes a body main structure, a body extension part mounting thereon the connecting part, and a body inner-lid part projected from the body extension part and to be bent. A shell includes a shell main body, a shell extension part supporting the body extension part, a shell inner-lid part projected from a side wall of the shell extension part, and a shell outer-lid part. A central conductor of a coaxial cable is interposed between the body inner-lid part bent with the shell inner-lid part and the connecting part, thereby being connected to the connecting part.