Golf club head

1. A hollow golf club head comprising:

a fiber-reinforced-plastic body including a main portion of a crown portion; and

a metal body including a face portion, a front edge portion of the crown portion continuous with the face portion, and a central portion of a sole portion in a toe-heel direction, wherein:

the front edge portion of the crown portion made of a metal defines a recess portion in an upper surface thereof,

a front edge portion of the fiber-reinforced-plastic body overlaps and is joined to the front edge portion of the crown portion made of the metal; and

the central portion of the sole portion narrows as the sole portion extends from a front to rear direction, wherein a front part of the sole portion comprises a groove portion which extends in a heel-toe direction.

2. The golf club head according to claim 1 , wherein the groove portion contains a plurality of recesses which are formed at the heel side and the toe side, respectively.

3. The golf club head according to claim 2 , wherein each of the plurality of recesses is narrowest nearest the central portion of the sole portion.

4. The golf club head according to claim 3 , wherein weight members are fitted into each of the plurality of recesses.

5. The golf club head according to claim 4 , wherein a resin plate is fitted in the groove portion to cover the weight members.

6. The golf club head according to claim 4 , wherein the central portion of the sole portion further comprises a threaded annular recess.

7. The golf club head according to claim 6 , wherein a screw-like weight member is disposed within the threaded annular recess.

8. The golf club head according to claim 7 , wherein a lightweight metal plate covers the threaded annular recess.