There is provided a resin composition that comprises a polycarbonate resin derived from an ether diol such as isosorbide and that is excellent in flame retardancy, heat resistance, thermal stability, rigidity, transparency and moldability. The resin composition is a flame-retardant resin composition comprising 1 to 60 parts by weight of phosphorus compound (component B) having a thermal decomposition temperature of not higher than 340° C. based on 100 parts by weight of polycarbonate resin (component A) that mainly comprises a recurring unit represented by the following formula (1)