Patent ID: 6945876

Claim:
A hollow golf club head comprising a hollow head body having a hollow space and formed from a metal, a hole formed in the vicinity of the middle of a crown portion of said head body, said crown portion having a peripheral edge extending around said hole, a flange over the hollow space and extending continuously all around the peripheral edge of said crown portion, and a cover member made of a material different from said head body that continuously overlaps said flange and closes said hole, wherein a ratio (ρm/ρf) of the specific gravity ρm of said head body and the specific gravity ρf of said cover member is set equal to or greater than 1.3, a face portion of said head body is laminated with a reinforcement made of a fiber reinforced plastic, and the ratio of the face area of a portion where said reinforcement and said head body are combined to the face area of said head body is set equal to or greater than 20%.