A battery wiring module attached to a battery group formed by juxtaposing a plurality of batteries each having electrode terminals, includes: a plurality of bus bars; and a plurality of holder units made of an insulating resin and having holding portions and holding the bus bars. The holder units include: a first holder unit disposed at an end; and a second holder unit which is a holder unit other than the first holder unit. The holding portion of the second holder unit is provided with a bus bar insertion portion through which the bus bars are inserted in the direction in which the batteries are juxtaposed, and the second holding portion of the first holder unit is provided with an encompassing wall and adapted to insert the bus bars in a direction in which the first holder unit is attached to the battery group.