Patent ID: 7048645

Claim:
A golf club shaft, comprising fiber reinforced resin layers, wherein prepregs are disposed from the tip end to the butt end and the area of these prepregs gradually decreases from the butt side to the tip side, the golf club shaft has an outer diameter of 10 to 12 mm in at least one portion of a range from a tip thereof disposed at a head-mounting side to a position located at 25% of a distance from said tip to a butt thereof; a minimum value of a flexural rigidity (El) is in a range of 1.00 to 2.50 kg·m 2 ; and a reinforcing layer is disposed from said tip to said position located at 25% of said distance from said tip to said butt, and said reinforcing layer includes: a straight layer consisting of a prepreg having reinforcing fiber with a tensile modulus of elasticity of 5 to 15 ton/mm 2 which is substantially parallel with an axis of said shaft; an angular layer consisting of a prepreg having reinforcing fiber with a tensile modulus of elasticity of 24 to 40 ton/mm 2 and an orientation angle of ±20 to 65° with respect to said axis of said shaft; and wherein prepregs disposed only on the tip side make up the straight layer and the angular layer.