To facilitate fuse replacement in the case where an overcurrent flows on an electric supply line connected to a plurality of electric lamps to blow a fuse.

A connector comprises a plug connector A and a receptacle connector B. The plug connector A comprises a plug insert 1 having a contact 3 for receiving a fuse 7 and a dummy contact 2, a cover insert 8 for pressing the fuse 7, a plug shell 12 for holding and fixing the plug insert, a coupling ring fitted into the plug shell and a potting shell 20. The receptacle connector B comprises a receptacle insert 31 holding a contact body 32 having a contact button 37, a spring 35 and a steel ball 36, a receptacle shell 41 for holding and fixing the receptacle insert 31, and a potting shell 46.