Gas-barrier polyamide film

A gas-barrier polyamide film comprising an inorganic thin film layer on at least one surface of a biaxially stretched polyamide film in which a functional layer (layer B) is laminated on at least one surface of a base layer (layer A), wherein

• the base layer (layer A) contains 99 to 70% by mass of a polyamide 6 resin, 1 to 30% by mass of a polyamide 11 resin in which at least a part of raw material is derived from biomass, and optionally a thermoplastic resin other than the polyamide 6 resin and the polyamide 11 resin, and the functional layer (layer B) contains a polyamide MXD6 resin and 70% by mass or more of the polyamide 6 resin,
• the thermoplastic resin other than the polyamide 6 and the polyamide 11 resin is selected from the group consisting of a polyamide 12 resin, a polyamide 6/12 copolymer resin, a polyamide 6/66 copolymer resin, a polyamide MXD6 resin, a polyester-based polymer, and a polyolefin-based polymer,
• the base layer (layer A) and the functional layer (layer B) do not contain a polyamide-based elastomer or a polyolefin-based elastomer, and
• the inorganic thin film layer is laminated on the functional layer (layer B) and consists of metal, inorganic oxide, or a combination thereof.