PURPOSE: To produce a composite casting having uniformly distributed particles and an optional packing rate of particles by melting successively from an end, a molding of a mixture composed of metallic powder and hard ceramic powder, and laminating and solidifying the melt thereof from the bottom in a casting mold.

CONSTITUTION: Metallic powder and ceramic powder having a high melting point are compounded at the ratio determined adequately according to the packing rate of the particles in an intended composite casting and after the two are thoroughly and intimately stirred and mixed, the mixture is made into a molding A having substantial strength in handling by press molding or the like. Such molding is attached as a consumable electrode to an electrode clamp 3 and the lower end part thereof is immersed into a molten slag S in a water-cooled moving casting mold 1 then electricity is conducted between the same and a casting ingot C from a power source 4. The molding A is then successively melten by the electric resistance heat from the end thereof thereby forming a pool B of the melt wherein the molten metal M and the ceramic particles Pc exist uniformly and mixedly in the mold 1. Such melt is cooled with the cooling water flowing between supply and drain ports 2 and 2 and is laminated and solidified from the bottom toward the upper part whereby the casting ingot C of the composite casting is obtd.