PROBLEM TO BE SOLVED: To provide a packaging material for a battery having an excellent molding property, with pin hole and a crack being hard to occur at the time of molding.SOLUTION: A packaging material for a battery is made from a lamination body in which at least a base material layer, an adhesive layer, a metal layer, and a sealant layer are sequentially stacked, with the lamination body meeting a relation of A+B≥2.50, where a value A of a stress at 40% expansion/a stress at 10% expansion along MD direction is added to a value B of a stress at 40% expansion/a stress at 10% expansion along TD direction, to provide a sum (A+B).SELECTED DRAWING: None
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