A resin composition which has high electrical conductivity and high stiffness, is suppressed in outgassing caused by a temperature rise and is excellent in heat stability during melt molding in the production process and a molded article thereof.The resin composition comprises (A) 65 to 85 parts by weight of an aromatic polycarbonate resin (component A), (B) 15 to 35 parts by weight of graphite having an average particle diameter of 5 to 60 μm (component B), and (C) 0.1 to 5 parts by weight of at least one compound (component C) selected from the group consisting of a polyester having a sulfonate group (component C-1) and a polyether ester having a sulfonate group (component C-2) based on 100 parts by weight of the total of the components A and B.