Patent ID: 6953402

Claim:
A golf club shaft comprising: a structure of a plurality of fiber reinforced prepreg layers layered one upon another, wherein a grip-side reinforcing layer is provided at a grip side of a shaft and a head-side reinforcing layer is provided at a head side of said shaft, wherein each of said grip-side reinforcing layer and said head-side reinforcing layer have a plurality of prepregs with lengths different from each other within the same grip-side reinforcing layer and said head-side reinforcing layer in an axial direction thereof (a longitudinal direction of said golf club shaft); in each of said grip-side reinforcing layer and said head-side reinforcing layer, the number of layers of said prepregs disposed only at both ends of said golf club shaft is set larger than that of layers thereof disposed at a middle part of said golf club shaft; and ends of said prepregs of said head-side reinforcing layer disposed at said middle part of said golf club shaft and those of said prepregs of said grip-side reinforcing layer disposed at said middle part of said golf club shaft do not overlap each other, respectively, wherein a position of a head-side end of said prepregs of said head-side reinforcing layer and a position of a grip-side end of said prepreg of said grip-side reinforcing layer are set to a range of not less than 0% nor more than 25% of an entire length of said golf club from each of both ends of said shaft, wherein a length of each of said prepregs of each of said head-side reinforcing layer and said grip-side reinforcing layer in said axial direction thereof ranges from not less than 5% to not more than 35% of the entire length of said golf club shaft; wherein said grip-side reinforcing layer has a straight layer composed of said prepregs having fibrous angles of 0° with respect to said axial direction of said golf club shaft, wherein said middle part of said golf club shaft is provided with a non-reinforcing portion where said prepregs of said head-side reinforcing layer and said prepregs of said grip-side reinforcing layer are not disposed; and a length of said non-reinforcing portion ranges from not less than 10% to not more than 60% of the whole length of said golf club shaft.