PURPOSE: To form a composite product having high strength and elasticity, by laminating reinforcing fibers having good wettability with Al and foil of a low m.p. Al alloy corresponding to an Al brazing alloy alternately, and heating the same under pressure in a nonoxidative atmosphere thereby combining both materials.

CONSTITUTION: Reinforcing fibers having good wettability with Al, for example, silicon carbide fibers, or reinforcing fibers having improved wettability, for example, metal-coated carbon fibers, and the foil of a low m.p. aluminum alloy corresponding to an aluminum brazing alloy, for example, the foil of an Al-Si- Mg alloy are laminated alternately. The laminate is heated to the m.p. of the foil of the low m.p. alloy or above and is pressurized in a nonoxidative atmosphere. The entire part of the low m.p. aluminum is thus melted and is impregnated among the reinforcing fibers in one body, whereby the composite material of the fiber-reinforced aluminum alloy is produced.