Patent ID: 8512073

Claim:
A coaxial electric connector configured so that a receptacle connector mounted on a printed wiring board and a plug connector coupled to a terminal part of a signal transmitting medium can be mutually mated/removed and configured so that a distal-end opening part of a cylindrical contact constituting the plug connector is inserted to a distal-end opening part of a cylindrical contact constituting the receptacle connector so as to be overlapped in inside/outside of a radial direction; wherein an insertion reference surface having a predetermined outer-diameter size D 1 is formed to extend by a predetermined length L in an axial direction on an outer peripheral surface of an inner-side contact positioned in the inner side of a radial direction among both of the cylindrical contacts; and a mating relation is set so that an inner peripheral surface of the outer-side contact positioned in the outer side of the radial direction among both of the cylindrical contacts has an inner-diameter size D 2 (D 2 ≈D 1 ) approximately same as an outer-diameter size D 1 of the insertion reference surface of the inner-side contact.