The present invention relates to a packaging material for a power storage device including at least a substrate layer, an adhesive layer, a metal foil layer, an anti-corrosion treatment layer, an adhesive resin layer and a thermal bonding resin layer laminated in this order, wherein a thickness of the adhesive layer is in a range of 0.3 to 3 µm, a 10-point average roughness Rzjis (in accordance with JIS B0601) of a surface of the metal foil layer which faces the substrate layer is in a range of 0.3 to 3 µm, and the thickness of the adhesive layer is not less than the 10-point average roughness Rzjis and not more than 3 µm, and a peel strength between the substrate layer and the metal foil layer (in accordance with JIS K6854-3) is in a range of 5 to 12 N/15 mm.