PURPOSE: To enable metal and resin to be reused by a method wherein the metal is separated from the resin in a resin composite in which the resin is bonded to the metal or the like.

CONSTITUTION: A resin composite (m) wherein resin 2 is bonded to a heat resistant material 1 such as a metallic material or the like, is cut to pieces of a suitable size. The product cut to pieces (m1) is contained in a processing container 5 of a centrifugal separator 4, heated at a suitable temperature, or heated under a suitably pressurized state. The resin which has been made a melted state is separated from the heat resistant material with centrifugal force.