Patent ID: 8657703

Claim:
A hollow golf club head including a face portion, a crown portion, and a sole/side portion which includes a sole portion and a side portion, comprising: a rib which extends from a toe side to a heel side in the sole portion; and a weight portion which is provided in the sole portion on one of a side of the face portion with respect to said rib and aback side with respect to said rib, and increases an amplitude of vibration of the sole portion, wherein the sole/side portion includes a thick region on the side of the face portion, a thin region, and a thick region on the back side in turn from the side of the face portion to the back side, wherein said weight portion comprises a protrusion protruding from said sole portion, no outer surface of said protrusion is connected to any portion of said head other than said sole portion, and said rib and said protrusion are disposed in the thin region and are not disposed in the thick regions.