| abstract |
To provide a golf ball having excellent flight performance when hit by a driver and excellent control performance in a wet state. A golf ball includes an inner core, an outer core, an intermediate layer, and a cover. Diameter D1, volume V1, inner hardness H1o and inner boundary hardness H1in in inner core 4; volume V2, outer boundary hardness H2out and surface hardness H2s in outer core 6; thickness Tm and hardness Hm in intermediate layer 6; The thickness Tc and the hardness Hc satisfy the following mathematical formula. 1.0 <V2 / V1 <7.0, −2 <H2s−H2out <2, 600 <(H1o + H1in) · (D1 / 2) / 2 <1000, 620 <Tc · Hc · Hm / Tm <900. The cover 10 includes a polyrotaxane. [Selection] Figure 1 |