Patent ID: 7404771

Claim:
A golf club shaft comprising a plurality of at least three resin sheets, reinforced with carbon fibers, which have a length equal to a full length of said golf club shaft and are sequentially wound around a mandrel, wherein said resin sheets reinforced with said carbon fibers are composed of carbon fiber prepreg sheets formed by impregnating said carbon fibers arranged properly in one direction with a resin; wherein in all carbon fiber prepreg sheets which have a length equal to a full length of said golf club shaft, a per-area weight of said carbon fiber in each of said all carbon fiber prepreg sheets is more than a per-area weight of said carbon fiber in the adjacent inner layer carbon fiber prepreg sheet from an innermost-layer to an outermost layer; and wherein a per-area weight of said carbon fiber of said outermost-layer prepreg sheet is CFn, a per-area weight of the said carbon fiber of said innermost-layer prepreg sheet is CF 1 , and the number of said carbon fiber prepreg sheets each having a length equal to said full length of said golf club shaft is N, such that (CFn/CF 1 )/N is set to a range of 0.7 to 1.25.