A wiring module attached to a plurality of electric cells having electrode terminals including positive electrodes and negative electrodes has a plurality of bus bars having pairs of through-holes respectively connected to the positive electrodes and the negative electrodes of the electric cells and bus bar insulating members each held by the adjacent bus bars. Of the plurality of bus bar insulating members, a first bus bar insulating member and a second bus bar insulating member are connected with each other by the bus bar.