This invention provides an interpolyether polyamide resin for coating onto or impregnation into a textile fabric to further improve, over prior art, sliding resistance and tear strength, which affect the expansion performance of an air bag as one of safety devices of automobiles. The interpolyether polyamide resin comprises a soft segment formed of a polyether polyamide comprising a polyether diamine compound and a dicarboxylic acid compound, and a hard segment formed of a polyamide comprising an aminocarboxylic acid compound and/or a lactam compound and bonded to the soft segment. The interpolyether polyamide resin is characterized by having an elongation of not less than 1000% and a modulus of elasticity of not more than 15 MPa.