To provide a flame-retardant resin compositions which achieves excellent flame retardancy without including conventional flame retardants, consequently gives very little effect on environment, has excellent wet-heat resistance and is suitable to be recycled.

For 100 pts.wt. of an aromatic polycarbonate resin (component A1), a flame-retardant resin composition (i) contains 0.1-2 pts.wt. of phyllosilicate (component B1), a flame-retardant resin composition (ii) contains 0.05-1 pt.wt. of inosilicate (component B2) and a flame-retardant resin composition (iii) contains 0.004-0.06 pt.wt. of a granular silicate alkali (alkaline earth) metal salt (component B3).