Patent ID: 7037214

Claim:
A hollow golf club head comprising a head body having a hollow space and formed from a metal, said head body having a face side and crown portion, a hole formed in the vicinity of the middle of the crown portion of said head body, said crown portion having a peripheral edge extending around said hole, a flange extending continuously all around the peripheral edge of said crown portion, said flange including a face side flange portion adjacent the face side of said head body and a cover member made of a material different from said head body and of a fiber reinforced plastic that continuously overlaps only said flange and closes said hole, wherein the ratio (ρm/ρt) of a specific gravity ρm of said head body and a specific gravity ρf of said cover member is equal to or greater than 1.3 and wherein said cover member is superimposed at least on the face side flange portion with an overlap margin equal to or greater than 5 mm in width.