Auußengehäusematerial for battery and lithium secondary battery

There is provided an outer casing material for a battery 4, wherein an outer layer 11, a metal foil layer 10 and an inner layer are laminated via an adhesive layer 8 5; the inner layer 8 comprises a seal layer 8b and a base material layer 8a; 8b, the sealing layer is formed from a propylene-ethylene copolymer, wherein the melt flow rate is at 230 ° C in the range of 3 to 30 g / 10 minutes; the base material layer 8a is formed of a resin composition, wherein the melt flow rate is 230 ° C in the range of 0.1 to 15 g / 10 minutes, the xylene-soluble component Xs satisfies the specified conditions, and the resin composition comprises from 50 to 80 mass % of a propylene component (a) and 50 to 20 mass% of a copolymer component (B) is an elastomer of a copolymer of propylene and ethylene and / or α-olefin having 4 to 12 carbon atoms and 50 to 85 mass% of a propylene includes derived polymerization.