To provide a composite member producing method and a composite member producing apparatus with which the penetration property of molten metal into a preformed body formed from a composite member is stabilized and the occurrence of breakage in the preformed body can be restrained and the producing efficiency of the composite member can be improved.

The preform PF as the preformed body formed from the composite member, is held into a holding vessel 11 provided with a containing space in the inner part. Then, the preform PF is preheated in a preheating furnace 21 together with the holding vessel 11 and the preheated holding vessel 11 is charged into a casing device 31, and the molten metal is poured and pressurized into the holding vessel 11 to penetrate into the preform PF and form the composite member.