Wood-type golf club head

1. A wood-type golf club head comprising:

a hollow structure comprising a crown portion, a sole portion, a side portion between the crown portion and sole portion, and a face portion having a back surface and a front surface defining a club face for striking a ball,

the hollow structure provided with a hollow and a solid part, wherein

the solid part extends forward from the backmost point of the club head to a position at a distance of from 0.08 to 0.20 times the maximum size of the club head in the back-and-forth direction,

the hollow extends between the front surface of the solid part and the back surface of the face portion, and

a main frame of the hollow structure integrally includes said solid part,

an outer surface of the sole portion is provided with a recess,

a vibration absorber is disposed in the recess,

the vibration absorber is composed of a soft part made of a viscoelastic material and a hard part made of a metal material,

the hard part comprises:

a tubular annular side wall having a hole, one end of which is opened, and

a bottom wall closing the other end of the hole,

the soft part is put in the hole of the hard part and in close contact with the hard part, and

the soft part is fixed to a bottom surface of the recess by the use of an adhesive agent,

the shortest distance between the vibration absorber and the front surface of the solid part measured in the horizontal direction is not more than 21 mm, and

the lateral moment of inertia of the head is not less than 5300 g sq.cm and not more than 5900 g sq.cm.

2. The club head according to claim 1 , wherein

the front surface of the solid part is inclined backward.

3. The club head according to claim 1 , wherein

the volume of the club head is not less than 300 cc.

4. The club head according to claim 1 , wherein

said maximum size of the club head in the back-and-forth direction is not less than 100 mm.

5. The club head according to claim 1 , wherein

the metal material of the hard part is made of one of Mn alloys, Ni—Ti alloys, Fe—Al alloys, Mg alloys and Mg.

6. The club head according to claim 1 , wherein

the volume of the club head is not less than 300 cc,

said maximum size of the club head in the back-and-forth direction is not less than 100 mm, and

the metal material of the hard part is made of one of Mn alloys, Ni—Ti alloys, Fe—Al alloys, Mg alloys and Mg.

7. The club head according to claim 6 , wherein

the front surface of the solid part is substantially flat and inclined backward.