To take measures to solve environmental problems (problems of waste and noxious chemicals, a global warming issue, air and water pollution problems, etc.), to minimize harmful effects on photographic properties and to improve various characteristics such as physical strength.

A polylactic acid resin film layer 1 is forming by using a light shielding polylactic acid resin composition comprising 100 parts (by mass) polylactic acid resin, 10 parts diisodecyl adipate as a shock resistance improver, 7 parts acetyltributylcitric acid as a plasticizer, 5 parts starch as a biodegradability promoter, 0.05 part oleic acid amide as a kind of aliphatic carboxylic acid amide and 0.1 part calcium stearate as a kind of fatty acid metallic salt as lubricants, 1 part tale as a crystallization accelerator and 5 parts oil furnace carbon black as a light shielding material.