PURPOSE: To obtain a composite member having characteristics such as light weight and high density, by compacting a fiber compact made of plural layers having different fiber densities, arranging the compact so that high density layer is positioned at surface side of product and pouring a cast-in material.

CONSTITUTION: Fiber layers A, B, C in which fiber density is increased in order are compacted, and sintered to prepare the fiber compact 3 made of plural layers. The sintered compact 3 is arranged so that the third layer C is brought to contact with the surface of a cavity 4a, and the first layer A is positioned inside the cavity 4a. The cast-in material 5 such as molten Al alloy is poured into the cavity 4a and these are pressed. Poured molten metal is impregnated into the compact 3 to fill the material 5 into pores therein, and the composite member 6 having a prescribed shape is obtd. In the member 6, the surface part where the layer C is positioned is reinforced. The compact 3 is cast-in with high joining strength.