A connector includes a required number of contacts, an electrical insulation housing and a metallic shell. A tab is formed in the connector. A pressure receiving portion of the tab is pushed by a pushing portion of the shell to move the pressure receiving portion toward a mounting face of a substrate for applying a force in the insertion of FPC but not applying a force to the tab in the detaching thereof, whereby an engaging portion of the tab is moved in a direction opposing to the mounting face of the substrate to unfasten the engaging portion from an locking portion of the FPC.