Method of producing layer-like clad metal materials

A method of producing layer-like clad metal materials, comprising applying at least one organic substance selected from the group consisting of phenolic resin, amino resin, epoxy resin, polyamide resin, acrylic resin, polyester resin, and vinyl acetate resin, on a surface of a metallic core material having at its surface substantially no oxide film to form a coating film having a thickness of 50-3,000 .mu.m, fixing said core material in a casting mold, using a fixing metal member in such a manner that the lower end of the core material is located at a position of 5-30 cm above the bottom surface of the mold, pouring a molten metal having the same composition around said core material up to a height of at least 5 cm above the upper end of the core material, into said mold by a bottom pouring process to form a clad metal ingot, subjecting said ingot to slab rolling or forging to form an intermediate product, and then subjecting said intermediate product to a hot working and, if necessary, a cold working.