Golf club head

1. A wood type golf club head comprising:

a crown portion;

a sole portion;

a side portion;

a face portion;

a plurality of interchangeable members; and

a plurality of attachment portions,

wherein said plurality of interchangeable members include at least

a first interchangeable member, and

a second interchangeable member,

said plurality of attachment portions include at least

a first attachment portion from which said first interchangeable member is detachable, and

a second attachment portion disposed at a portion different from said first attachment portion, from which said second interchangeable member is detachable,

said first interchangeable member is detachable from said second attachment portion,

said second interchangeable member is detachable from said first attachment portion,

said first attachment portion is disposed in said sole portion,

said second attachment portion is disposed in said side portion on a back side,

said second attachment portion is disposed at a portion spaced apart from said first attachment portion at least in a face-back direction and in a toe-heel direction,

said first interchangeable member is heavier than said second interchangeable member,

said first interchangeable member is a reinforcing member that abuts against only a lower portion in a rear surface of said face portion and restricts deformation of the lower portion when said first interchangeable member is attached to said first attachment portion,

said first interchangeable member does not abut against the rear surface of said face portion when said first interchangeable member is attached to said second attachment portion,

said second interchangeable member is a member that does not abut against the rear surface of said face portion when said second interchangeable member is attached to said first attachment portion,

said second interchangeable member does not abut against the rear surface of said face portion when said second interchangeable member is attached to said second attachment portion,

in a first attachment mode, said first interchangeable member is attached to said first attachment portion and said second interchangeable member is attached to said second attachment portion,

in a second attachment mode, said first interchangeable member is attached to said second attachment portion and said second interchangeable member is attached to said first attachment portion,

in the second attachment mode:

an area having a high repulsion in said face portion is wider than in the first attachment mode;

a gravity depth of the head is deeper than in the first attachment mode; and

a moment of inertia of the head is larger than in the first attachment mode.

2. The wood type golf club head according to claim 1 , wherein said first interchangeable member and said second interchangeable member have total lengths that are different from each other.

3. The wood type golf club head according to claim 1 , wherein the lower portion is a central portion in the toe-heel direction.

4. The wood type golf club head according to claim 1 , wherein each of said first interchangeable member and said second interchangeable member comprises a screw shaft, and

each of said first attachment portion and said second attachment portion comprises a threaded hole that threadably engages with said screw shaft.

5. The wood type golf club head according to claim 4 , wherein said sole portion includes a concave portion,

said concave portion includes a wall portion located at a central portion in the toe-heel direction and at a side of said face portion in the face-back direction, and

said first attachment portion is formed in the wall portion.

6. The wood type golf club head according to claim 4 , wherein said threaded hole of said first attachment portion is formed so as to make a center line cross said face portion.

7. The wood type golf club head according to claim 4 , wherein said screw shaft of said first interchangeable member comprises one of a solid metal member or a hollow metal member.

8. The wood type golf club head according to claim 1 , wherein said plurality of interchangeable members include at least three interchangeable members.

9. The wood type golf club head according to claim 1 , wherein said plurality of attachment portions include at least three attachment portions.

10. The wood type golf club head according to claim 1 , wherein said face portion has a height H, and

the lower portion is positioned within an area of H×0.3 from a lower end of said face portion.

11. The wood type golf club head according to claim 1 , wherein said plurality of attachment portions includes only said first and second attachment portions.