There is provided an aromatic polycarbonate resin composition which exhibits high flame retardancy without sacrificing melt-molding stability or melt fluidity when molding the resin composition. The flame retardant aromatic polycarbonate resin composition comprises a resin component (a) comprising an aromatic polycarbonate and optionally a styrene polymer, the resin composition having an aromatic polycarbonate content of 20% by weight or more; and 0.1 to 50 parts by weight of an organopolysiloxane (b) comprising a linear organopolysiloxane (b)i and a cyclic organopolysiloxane (b)ii, component (b)ii present in an amount of from 5 to 95% by weight based on the total weight of components (b)i and (b)ii.