A process is provided for the manufacture of shaped articles by molding a thermoplastic resin and filler. The process comprises mixing a thermoplastic resin with a filler preheated to a temperature at which the filler will have an amount of heat sufficient for heating the resin to its melting point and which is 50.degree. to 200.degree.C higher than the same melting point, and subjecting the mixture to molding into articles of desired forms and sizes. Various sorts of molding machines can be used, and the manufacturing costs are low.