To provide a connecting member and a connecting method wherein a plug is fixed to a receptacle in a neck-swingable state, and stress of the plug and a cord is made not to occur.

This is composed of an electrode, a roughly spherical retaining member retaining the electrode, and a housing in which the retaining member is rotatably surrounded by the retaining member, and at the housing, an aperture is installed so that the electrode is exposed, and the plug is connected in the swingable state. Furthermore, the plug is provided with the aperture, and in the aperture, an elastic cover is formed, and when the plug is connected with the receptacle, the cover covers over a part of the receptacle, and connecting state is assisted.