PURPOSE: To aim at improvements in strength to high temperature and prevention against separation, by making up an intake valve seat corresponding part of a cylinder head into fiber reinforcing metalization, while installing a convering layer made of a fiber reinforced metal, making an Al alloy or the like a base metal, in a valve hitting surface part.

CONSTITUTION: An intake valve seat corresponding part of a cylinder head body 3 is made up into a fiber reinforced metal (FRM) 2, while a covering layer 4 made of a wearproof fiber reinforced metal, making an Al alloy or a Mg alloy a base material, is installed in a valve hitting surface part 5. At this time, as a reinforced fiber, such ones as metal fibers or ceramics fibers and the like being resistible to high temperature in time of casting are used. In these fibers, if they are of long fiber, those of 5W300μm in filament diameter is desirable but if they are of short fiber, those of 0.05W20μm in filament diameter and 10W500μm in length are desirable as well as it is also desirable that they be contained at a bulking rate of 3.0W40% each. With this constitution, strength to high temperature and rigidity in the valve hitting surface base material part is well improved and, what is more, separation in the covering layer 4 is preventable.