PURPOSE: To improve the flexibility and gas impermeability of a molding, by mixing a poly(ether)-ester-amide resin with an ethylene/vinyl acetate copolymer saponificate.

CONSTITUTION: A polyester component (A) comprising a dicarboxylic acid and a low-molecular diol is polycondensed with a polyamide component (b) comprising at least one member selected from among an ω-amino acid, an ω-lactam and a diamine and a dicarboxylic acid in an amount to give a weight ratio (a/b) of 5W50/95W5 to obtain a polyester-amide resin (A). Separately, a polymer diol is polycondensed with component (a) or a dicarboxylic acid and component (b) to obtain a polyether-ester-amide resin (B) having a weight ratio (c/d) (wherein (c) is a polyether ester component, and (d) is a polyamide component) of 10W40/90W60. Component A and/or component B is mixed with an ethylene/vinyl acetate copolymer saponificate (C) of an ethylene content ≤80mol % and a degree of saponification of vinyl acetate ≥90mol % in an amount to give a weight ratio (component A and/or component B/component C) of 5W90/95W10.