The present invention provides an ionomer composition for a golf ball providing a golf ball which is excellent in abrasion-resistance, durability and resilience, and a golf ball using the same. The ionomer composition for a golf ball of the present invention comprises a polymer containing at least following component as a constituent component: first component: an olefin monomer having 2 to 8 carbon atoms; second component: an unsaturated carboxylic acid having 2 to 18 carbon atoms; and third component: a diene or a diene polymer, wherein at least 10 mole % of the carboxyl group in the polymer is neutralized with an inorganic metal compound.