A bus bar module of the present invention is disposed on one end side of each battery in a battery group consisting of a plurality of batteries having terminals at their ends in a longitudinal direction. The bus bar module includes a bus bar made of a conductive metal and electrically connecting the terminals of the respective batteries in the battery group; and an insulating laminate portion that is laminated, at least on an inner surface of the bus bar, among the inner surface facing the ends of the batteries and an outer surface on an opposite side of the inner surface of the bus bar. The insulating laminate portion has an insulating material comprising thermoplastic elastomer and/or rubber.