BUS BAR MODULE

A bus bar module includes bus bars electrically connected with battery cells included in a battery module, and an insulating case including a housing unit that accommodates the bus bars and a routing path in which a voltage detection line connected with the bus bars is routed. The bus bars include a first bus bar group arrayed in a direction in which the battery cells are arranged, and a second bus bar group parallel to the first bus bar group and arrayed in the direction in which the battery cells are arranged. The routing path includes a first routing path extending along the first bus bar group, a second routing path extending along the second bus bar group, and at least one connection path connecting the first routing path and the second routing path.