A bus bar module includes a bus bar (11) and a bus bar case (20) made of an insulating resin. The bus bar (11) has a pair of connection seat portions and a conductive piece portion (13). The bus bar case (20) has an opening that exposes each connection seat portion to the front surface side. The bus bar case (20) houses the bus bar (11). The bus bar case (20) includes a base wall (26) along an extending direction of the conductive piece portion (13). A locking piece (27) that locks the conductive piece portion (13) of the bus bar (11) is disposed on the base wall (26). The locking piece (27) is provided with a restricting portion that is engaged with the conductive piece portion (13) to restrict the position of the conductive piece portion (13).
