Patent ID: 6913548

Claim:
A multi-piece solid golf ball comprising a core consisting of an inner core, an intermediate layer formed on the inner core and an outer layer formed on the intermediate layer, and a cover covering the core, wherein the inner core has a flexural rigidity of 20 to 80 MPa, a ratio (R M /R I ) of a flexural rigidity of the intermediate layer (R M ) to that of the inner core (R I ) is within the range of 0.6 to 1.4, a flexural rigidity of the outer layer is higher than that of the inner core by 70 to 500 MPa, and assuming that a radius of the golf ball is represented by r g , a radius of the inner core is represented by r I and a radius of a two-layer structured core obtained by forming the intermediate layer on the inner core is represented by r T , the intermediate layer is placed such that the r G , r I and r T satisfy the following two formulae: r I /r G ≧0.70 r T /r G ≦0.83.