An accommodating member in which an electronic component is accommodated, a cover member that is assembled to the accommodating member to block an opening by being moved toward the opening of the accommodating member, and a positioning structure arranged in an internal space of a housing including at least the assembled accommodating member and the cover member, and which performs positioning at the time of assembly of the accommodating member and the cover member are at least included, and the positioning structure includes a positioning pin arranged inside one of the accommodating member and the cover member, and extending along an assembling direction of the accommodating member and the cover member, and a pin insertion portion arranged inside the other of the accommodating member and the cover member, and into which the positioning pin is inserted at the time of assembly of the accommodating member and the cover member.