Golf ball 2 has a center 5, a mid layer 6, a cover 4 and numerous dimples 8. A product Pm of a volume Vm multiplied by a flexural rigidity Fm in the mid layer 6 and a product Pc of a volume Vc multiplied by a flexural rigidity Fc in the cover meet the following formulae (I) and (II). 1400<(Pm+Pc)<2000 (I) 5.0<(Pc/Pm)<7.6 (II) Provided that mean diameter of all the dimples 8 is Da, a ratio (N1/N) of number N1 of adjacent dimple pairs having a pitch of (Da/4) or less to total number N of the dimples 8 is equal to or greater than 2.70. A ratio (N2/N1) of number N2 of the adjacent dimple pairs having a pitch of (Da/20) or less to the number N1 is equal to or greater than 0.50.