A bus bar module comprising: a plurality of bus bars electrically connectable with a plurality of battery cells included in a battery module; an insulating case including a housing unit configured to accommodate the bus bars and a routing path in which a voltage detection line connected with the bus bar is routed, the case having rectangle shape; and a thermistor configured to detect temperature of the battery cell, wherein the bus bars include a first bus bar group arrayed in a longitudinal direction of the case, and a second bus bar group parallel to the first bus bar group and arrayed in the longitudinal direction, and the routing path includes a first routing path extending along the first bus bar group in the longitudinal direction, a second routing path extending along the second bus bar group in the longitudinal direction, and at least one connection path connecting the first routing path and the second routing path, characterized in that the first routing path is partitioned into a plurality of partial routing paths (51, 52, 53) arranged in the longitudinal direction, each of the partial routing paths (51, 52, 53) of the first routing path is connected with the second routing path through the connection path, the thermistor is held at a first end part (52a, 53a) as one end part of the partial routing path (52, 53), the connection path is connected with the partial routing path (52, 53) at a position different from the first end part (52a, 53a), and the first end part (52a, 53a) is provided with a partition wall that partitions the thermistor from another adjacent partial routing path (51, 52). a plurality of bus bars electrically connectable with a plurality of battery cells included in a battery module; an insulating case including a housing unit configured to accommodate the bus bars and a routing path in which a voltage detection line connected with the bus bar is routed, the case having rectangle shape; and a thermistor configured to detect temperature of the battery cell, wherein the bus bars include a first bus bar group arrayed in a longitudinal direction of the case, and a second bus bar group parallel to the first bus bar group and arrayed in the longitudinal direction, and the routing path includes a first routing path extending along the first bus bar group in the longitudinal direction, a second routing path extending along the second bus bar group in the longitudinal direction, and at least one connection path connecting the first routing path and the second routing path, characterized in that the first routing path is partitioned into a plurality of partial routing paths (51, 52, 53) arranged in the longitudinal direction, each of the partial routing paths (51, 52, 53) of the first routing path is connected with the second routing path through the connection path, the thermistor is held at a first end part (52a, 53a) as one end part of the partial routing path (52, 53), the connection path is connected with the partial routing path (52, 53) at a position different from the first end part (52a, 53a), and the first end part (52a, 53a) is provided with a partition wall that partitions the thermistor from another adjacent partial routing path (51, 52).