A golf ball 2 includes a core 4, an envelope layer 6, a mid layer 8 and a cover 10. A thickness Tm of the mid layer 8 is equal to or less than 1.0 mm. A thickness Tc of the cover 10 is less than 0.6 mm. The sum of the thicknesses Tm and Tc is equal to or less than 1.5 mm. A hardness Hc of the cover 10 is less than 40. The hardness Hs, the hardness Hm, and the hardness Hc satisfy the following formula (1). Hs>Hc>Hm  (1) The base material of the envelope layer 6 is ionomer resin. The base material of the mid layer 8 is polyurethane. The base material of the cover 10 is polyurethane.