In a shaft 6, a shaft full length is defined as Ls, and a distance between a tip end of the shaft and a center of gravity G of the shaft is defined as Lg. Lg/Ls is 0.52 or greater and 0.65 or less. A shaft weight is equal to or less than 52 g. Preferably, the shaft 6 has butt partial layers a5 and a6. When a point separated by 250 mm from a butt end Bt is defined as P2; a range from the point P2 to the butt end Bt is defined as a specific butt range; the total weight of the butt partial layers a5 and a6 existing in the specific butt range is Wa gram; and a weight of the shaft in the specific butt range is defined as Wb gram, Wa/Wb is preferably equal to or greater than 0.4.