Golf ball

A golf ball comprising a core, an intermediate layer encasing the core, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples, wherein the core is formed primarily of a rubber material;

• the intermediate layer and the cover are formed primarily of like or unlike resin materials;
• the core has a hardness which gradually increases from a center to a surface thereof, the hardness difference in JIS-C hardness units between the core center and the core surface being at least 15 and, letting (I) be the average value for cross-sectional hardnesses at a position about 15 mm from the core center and at the core center and letting (II) be the cross-sectional hardness at a position about 7.5 mm from the core center, the hardness difference (I)−(II) in JIS-C units being not more than ±2;
• and the intermediate layer and cover have hardnesses which satisfy the condition:
• cover hardness>intermediate layer hardness,
• wherein the intermediate layer and cover have thicknesses which satisfy the condition:
• cover thickness≦intermediate layer thickness,
• wherein the core is a single layer, the intermediate layer is a single layer and the cover is a single layer,
• wherein the golf ball comprises three layers and the intermediate layer contacts the cover and the core.