A golf club shaft has the bending rigidity distribution and the torsional rigidity distribution satisfying the following three relational formulas: 1) S2/S1≧2.5, wherein an average inclination of the bending rigidity in an interval from 400 mm to 700 mm from the front end of the shaft is defined as S1 and an average inclination of the bending rigidity in an interval from 800 mm to 950 mm from the front end of the shaft is defined as S2; 2) 1.0