BUS BAR MODULE

A bus bar module (1) includes bus bars (2) electrically connected with battery cells included in a battery module, and an insulating case (3) including a housing unit (30) that accommodates the bus bars and a routing path (40) in which a voltage detection line connected with the bus bars is routed. The bus bars include a first bus bar group (21) arrayed in a direction in which the battery cells are arranged, and a second bus bar group (22) 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 (41) extending along the first bus bar group, a second routing path (42) extending along the second bus bar group, and at least one connection path (43) connecting the first routing path and the second routing path.