Golf ball

A golf ball comprising a spherical core and at least one cover covering the spherical core,

• wherein the spherical core is formed from a rubber composition containing:
• (a) a base rubber,
• (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent,
• (c) a crosslinking initiator,
• (d) an unsaturated fatty acid excluding an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms, and
• (g) an organic sulfur compound, and
• provided that the rubber composition further contains (f) a metal compound if only an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms is present as (b) the co-crosslinking agent;
• wherein (a) the base rubber contains a polybutadiene rubber and a polyisoprene rubber, and a mass ratio (polybutadiene rubber/polyisoprene rubber) of the polybutadiene rubber to the polyisoprene rubber in (a) the base rubber is 1 or more, and 20 or less,
• wherein (d) the unsaturated fatty acid has a carbon-carbon double bond in an amount per unit mass ranging from 1.00 mmol/g to 10.00 mmol/g,
• wherein the rubber composition contains a single kind of (c) the crosslinking initiator,
• wherein the rubber composition contains (c) the crosslinking initiator in an amount ranging from 0.2 part by mass to 0.9 part by mass with respect to 100 parts by mass of (a) the base rubber, and
• wherein the rubber composition contains (g) the organic sulfur compound in an amount ranging from 0.05 part by mass to 2.0 parts by mass with respect to 100 parts by mass of (a) the base rubber.