NOVELTY - A resin composition comprises thermoplastic resin (100 weight parts), bisbenzo oxazinone compounds (0.01-5 weight parts) which contains benzoic acid derivative ( less than or equal to 0.15 wt.%) and sodium metal ( less than or equal to 50 ppm) and has purity of greater than or equal to 98%, light-reflecting power measurement of 380-480 nm of visible light region in powdered state and maximum light reflecting power of greater than or equal to 100%, and fatty acid ester compounds (0.01-1 weight part) which are ester of polyhydric alcohol and aliphatic carboxylic acid in which 5% weight reduction temperature in thermogravimetric analysis is 250-360 degrees C and acid values are 4-20.    USE - Resin composition for transparent molded article for vehicle e.g. vehicle lamp lens, grinding material (claimed), roofs and window glasses for building, house and greenhouse, garage and arcade, lens for lamps, signal-apparatus lens, optical instrument, mirror, eyeglass lens and goggles, muffling wall, windshield of motorbike, name plate, solar cell cover or solar cell base material, cover for display units, touch panel, and components for game machines (circuit cover, chassis and pachinko ball conveyance guide). Can also be used for electronic apparatuses, electronic office equipment, vehicle components, machine component, other agricultural materials, fishery materials, conveyance container, packaging container, play equipment, and miscellaneous goods.    ADVANTAGE - The composition is excellent in transparency, color tone, weather-proof, heat-and-moisture resistance, thermal stability and release property.    DETAILED DESCRIPTION - A resin composition comprises thermoplastic resin (100 weight parts), bisbenzo oxazinone compounds (0.01-5 weight parts) of formula (1) which contains benzoic acid derivative ( less than or equal to 0.15 wt.%) of formula (2) and sodium metal ( less than or equal to 50 ppm) and has purity of greater than or equal to 98%, light-reflecting power measurement of 380-480 nm of visible light region in powdered state and maximum light reflecting power of greater than or equal to 100%, and fatty acid ester compounds (0.01-1 weight part) which are ester of polyhydric alcohol and aliphatic carboxylic acid in which 5% weight reduction temperature in thermogravimetric analysis is 250-360 degrees C and acid values are 4-20.    R1,R2=H, OH, 1-3C alkyl group, 1-3C alkoxy group, 1-3C acyl group, 1-3C acyloxy group, 1-3 alkoxycarbonyl group, halo, NO2 or COOH.    An INDEPENDENT CLAIM is included for a molded article comprising resin composition.