Abstract: An apparatus for producing a compound material such as a fiber reinforced metal comprises a first retaining chamber into which molten matrix metal e.g. aluminum etc. is introduced, a plunger for applying a pressure to the molten matrix metal positioned below the first retaining chamber, a second retaining chamber adapted to receive reinforcement materials e.g. fibrous ceramics called "whisker", the second retaining chamber being in vertical alignment with the first retaining chamber so as to communicate therewith, a clamping device positioned above the second retaining chamber and supported movably in a vertical direction, and heating means provided in the first and second retaining chambers. The apparatus thus configured makes it possible to easily impregnate the molten matrix metal into space between the reinforcement materials, thus producing a reinforced compound material with high quality.