A terminal plate circuit including a terminal plate, a rectangular wire, and a pressing member, characterized in that a hole through which the rectangular wire penetrates is provided in the terminal plate; the rectangular wire is inserted into this hole so as to establish an electrical contact between the terminal plate and the rectangular wire; and the contact state is maintained by a pressing force of the pressing member to the part of the surface of the rectangular wire on the side opposite to the part of the surface of the rectangular wire that is in contact with the terminal plate, and that the pressing member has a sandwiching part that can sandwich the end of the terminal plate, and the pressing force of the pressing member to the rectangular wire is generated by sandwiching the end of the terminal plate with this sandwiching part.