Patent ID: 7637823

Claim:
A hollow golf club head comprising: a fixing member having a shaft body formed with a threaded portion at one end, and a head portion at the other end of said shaft body; a viscoelastic body being flat and having a first opening through which said shaft body extends; a recess portion formed in a circumferential wall of the golf club head and in which said viscoelastic body is disposed, said recess portion having a bottom portion which is in contact with one surface of said viscoelastic body; a screw hole formed in said bottom portion and threadably engages with said threaded portion, and an interposed member interposed between said viscoelastic body and said head portion and includes a second opening through which said shaft body extends, said interposed member covering the whole viscoelastic body and having a flat surface being in contact with the other surface of said viscoelastic body, wherein said viscoelastic body is fixed between said interposed member and said bottom portion by threadably engaging said threaded portion with said screw hole. a plurality of said viscoelastic bodies having different vibration damping performances are fixed between said interposed member and said bottom portion and said interposed member includes a thin-walled portion in which said head portion is partly buried and said flat surface is the same shape as said viscoelastic body.