In a golf ball comprising a core and a cover of at least one layer enclosing the core, at least one layer of the cover is formed of a resin composition comprising as essential components, (a) a component selected from the group consisting of an olefin-unsaturated carboxylic acid copolymer, an olefin-unsaturated carboxylic acid-unsaturated carboxylic acid ester copolymer, and metal ion-neutralized products of these copolymers, and (b) a binary copolymer consisting of a polyolefin component and a polyamide component.