Golf club head

A golf club head comprising:

• a head body that includes a hosel portion, a face portion, and a sole portion;
• a sleeve that is detachably attached to the hosel portion;
• and
• a screw member that attaches the sleeve from a sole side by screwing, wherein
• the hosel portion includes a hosel hole and a hosel end face,
• the hosel end face is positioned lower than an uppermost point of the head body,
• an end face of the sleeve is positioned lower than the uppermost point of the head body, and
• when an outer diameter of the hosel end face is denoted by D2 (mm), a bulge curvature of the golf club head is denoted by Rb (mm), and a face length of the golf club head is denoted by W1 (mm), then the golf club head has a face progression that is denoted by FP (mm) and satisfies the following relationship (1):
• Rb
• -
• {
• Rb
• 2
• -
• (
• W
• ⁢
• 1
• /
• 2
• )
• 2
• }
• 1
• /
• 2
• +
• D
• ⁢
• 2
• >
• FP
• >
• Rb
• -
• {
• Rb
• 2
• -
• (
• W
• ⁢
• 1
• /
• 2
• )
• 2
• }
• 1
• /
• 2
• +
• D
• ⁢
• 2
• /
• 2.
• (
• 1
• )