A reinforced resin composition comprising 100 parts by weight of a resin component comprising a polycarbonate resin, a thermoplastic polyester resin and an impact modifier in a ratio, by weight, of 90-10:10-90:0-40 and 0.5 to 100 parts by weight of kaolin with a mean particle diameter of 0.1 to 4.0 .mu.m. The composition can be molded by conventional techniques such as injection molding and extrusion molding into automotive parts, electrical or electronic parts and other products excellent in heat resistance, impact resistance, rigidity, dimensional stability, chemical resistance, moldability, weather resistance and thermal stability with a low linear coefficient of expansion and excellent surface gloss and appearance.