A busbar includes a plate-shaped body section and a wire connection section extended from the body section. The body section includes a first plate section, a second plate section, and a folding-back section connecting the first plate section and the second plate section. The first plate section and the second plate section are stacked mutually by folding-back the folding-back section. The first plate section has an outer shape that is positioned to a busbar accommodation section of a wire routing member made of insulation resin. A maximum width dimension of the second plate section in a direction parallel to the folding-back section is smaller than that of the first plate section in the direction parallel to the folding-back section.