A main body portion is to be mounted to a housing by being inserted into the housing. An electrical wire insertion portion is provided in an end portion of the main body portion, defines an insertion opening into which a leading end portion of an electrical wire is to be inserted, and is configured to restrict movement of the electrical wire in a direction perpendicular to the direction of insertion of the electrical wire into the insertion opening. A conductive body connection portion is provided in the main body portion and is configured to be electrically connected to a conductive body of the electrical wire inserted into the insertion opening. A partner connection portion is provided in the main body portion and is configured to be electrically connected to a partner terminal.