To solve a problem that it is difficult for not only disabled or aged persons but also comparatively young persons to connect the wiring by inserting a current-carrying blade of an attachment plug into a blade receiver of a fine and small plug receiver in a gloomy and blind spot, though it is not the difficult work for the comparatively young persons under a bright and calm place, and further the work has the possibility of receiving the electric shock.

In this attachment plug, a guide longer than the current carrying blade is mounted outside the current-carrying blade, a guide receiver is mounted on the plug receiver in addition to the blade receiver, an outer periphery of the guide receiver is smoothly raised for making the positioning easy and to reduce the possibility of receiving the electric shock.