To provide a packaging material having sufficient strength, excellent in easy tear properties and capable of being opened linearly.

In the packaging material for a photosensitive material, a photosensitive and heat-sensitive material or a heat-sensitive material is constituted by providing an intermediate layer between the outermost layer, which comprises a heat-resistant flexible sheet, and the innermost layer composed of a shading heat-sealable layer containing high-pressure low density polyethylene, the intermediate layer is a uniaxially stretched thermoplastic resin layer characterized in that the ratio of tensile strength in its longitudinal direction and that in its lateral direction according to JIS K 7127 is 4-50.