The present invention provides a multi-piece
solid golf ball having a core, an envelope layer encasing the core, an intermediate layer encasing the envelope layer, and a cover which encases the intermediate layer and has formed on a surface thereof a plurality of dimples. The envelope layer has an inner layer and an outer layer. The core is formed primarily of a
rubber material. The inner and outer envelope
layers, the intermediate layer and the cover are each formed primarily of the same or different resin materials. The inner and outer envelope
layers, intermediate layer and cover have thicknesses which satisfy the following conditions (i) and (ii):cover thickness<intermediate
layer thickness<(
inner envelope layer thickness+outer envelope
layer thickness) (i)(cover thickness+intermediate layer thickness)<(
inner envelope layer thickness+outer envelope layer thickness). (ii)The
inner envelope layer, outer envelope layer, intermediate layer and cover have
Shore D hardnesses which satisfy the following condition (iii):inner envelope layer
hardness<outer envelope layer
hardness<intermediate layer
hardness>cover hardness. (iii)The
total thickness of the envelope layer is at least 2.0 mm but not more than 10.0 mm.The
golf ball has an outstanding flight performance and
controllability which are acceptable to professionals and other skilled players, in addition to which it has an excellent durability to
cracking under repeated
impact and an excellent scuff resistance.