Abstract: To suppress a temperature-rise in and to improve the quality of a bus bar when a desired width for the bus bar is not ensured, a bus bar is formed by stamping from a conductive metal plate of a predetermined thickness. The bus bar is configured to be included in an electric junction box for installation in an automobile. The bus bar includes a main bus bar formed by stamping from a conductive metal plate according to a circuit pattern and an auxiliary bus bar that is laminated and firmly fixed at a location on the main bus bar where the main bus bar cannot be stamped with a desired width. The auxiliary bus bar is fixed to the main bus bar, for example, by welding, to form an integrated combination. At the welded portion of the integrated combination, the width of the main bus bar or the width of the auxiliary bus bar is no greater than other portions.