A packaging material for a power storage device of the present invention includes: a base layer having a first surface and a second surface, the first surface having at least a first adhesive layer, a metal foil layer, an anticorrosive treatment layer, a second adhesive layer, and a sealant layer laminated thereon in this order; and a base protective layer laminated on the second surface of the base layer, and formed containing at least one base resin selected from a group consisting of a polyester polyol and an acrylic polyol, each of which has a group having a hydroxyl group on a side chain, and a curing agent containing at least one of a biuret type and an isocyanurate type of isocyanate.