A method of manufacturing a golf club head of composite material includes the
steps
of combining a first and a second dies having recessed portions and at least on
tunnel portion respectively to form a mold cavity, putting a bulk molding compound
(B.M.C.) into the mold cavity, compressing a mold plunger into the mold cavity
through the tunnel portion such that a mold space, which is defined by a mold portion
of the mold plunger and the recessed portions of the dies, is filled with the B.M.C.,
and then separating the first die, the second die and the mold plunger while the
B.M.C. is solidified to get a golf club head with a shape corresponding to the
mold space.