Disclosed is a flame retardant resin composition comprising: 100 parts by weight of a resin component (A) which is a resin mixture of an aromatic polycarbonate and a styrene polymer, wherein the resin mixture has an aromatic polycarbonate content of from 50 to 95% by weight and a styrene polymer content of from 5 to 50% by weight; 0.1 to 30 parts by weight of an organopolysiloxane (B) which comprises 0 to 70 mol % of a monofunctional siloxane unit (M unit), 0 to 100 mol % of a bifunctional recurring siloxane unit (D unit), 0 to 100 mol % of a trifunctional recurring siloxane unit (T unit), and 0 to 63 mol % of a tetrafunctional recurring siloxane unit (Q unit); and 0.0005 to 5 parts by weight of at least one inorganic metal salt (C) selected from the group consisting of inorganic alkali metal salts and inorganic alkaline earth metal salts.