To protect the inside of an electromagnetic induction type connector that is loaded to an electric bicycle, and at the same time to facilitate the fitting operation.

A lid section 31 is provided in an electromagnetic induction type secondary connector 20 that is loaded to an electric bicycle 60, the lid section 31 is opened by a lever 62 that is provided in a handle 61 of the electric bicycle 60, and the lid section 31 is moved to a position along the secondary connector 20 by fitting connectors 10 and 20, thus protecting the secondary connector 20 that is loaded to the electric bicycle 60, opening the lid section 31 while one is on the electric bicycle 60, enabling the fitting of the connectors 10 and 20, and hence facilitating fitting operation.