Abstract: The golf club shaft comprises a reinforced tip portion from the tip end to the position 300 mm toward the grip end, gripping butt portion from the grip end to the position 100 mm toward the tip end, and an intermediate portion between the reinforced tip portion and the gripping butt portion. The shaft satisfies an equation EI=&agr;·X at its intermediate portion, where EI (Nm2) is the flexural rigidity, X (mm) is the distance from the tip end of the shaft, and &agr; is a given constant. The &agr; values of the shafts in accordance with the embodiments 1 through 3 are 0.12, 0.09, and 0.06, respectively. Thus, the present invention has an improved deflection during downswing and is liked by a majority of players.

Abstract: A golf club shaft includes an inner layer, an intermediate layer placed on the inner layer, and an outer layer placed on the intermediate layer. The intermediate layer has inclined yarns, which are substantially symmetric and have predetermined orientation angles relative to the longitudinal axis of the shaft, and longitudinal yarns, which are parallel to the longitudinal axis of the shaft. The orientation angles of the inclined yarns vary along the longitudinal axis of the shaft.

Abstract: A golf club includes a shaft, a head attached to the tip end of the shaft, and a grip attached at the butt end of the shaft. The 14-inch balance is D0 or more. The club has initial velocity per equivalent pendulum length Vb/Lp that is larger than −3.57 Lc+64.58 when Lc represents the club length. The initial velocity Vb is defined as: Vb=1.8 Mh(56.22 Lc−35.16 Mc−39.77 Lp+31.61)/(Mh+0.0455) where Mh is the mass of the head (kg) and Mc is the total mass of the club.

Abstract: The golf club shaft comprises a reinforced tip portion from the tip end to the position 300 mm toward the grip end, gripping butt portion from the grip end to the position 100 mm toward the tip end, and an intermediate portion between the reinforced tip portion and the gripping butt portion. The shaft satisfies an equation EI=&agr;·X at its intermediate portion, where EI (Nm2) is the flexural rigidity, X (mm) is the distance from the tip end of the shaft, and &agr; is a given constant. The &agr; values of the shafts in accordance with the embodiments 1 through 3 are 0.12, 0.09, and 0.06, respectively. Thus, the present invention has an improved deflection during downswing and is liked by a majority of players.