Provided are a thermoplastic resin composition including 100 parts by weight of a base resin including (A-1) a polycarbonate resin, (A-2-1) a first acrylonitrile-butadiene-styrene graft copolymer including a rubber polymer having an average particle diameter of 200 nm to 400 nm and an acrylonitrile-butadiene-styrene copolymer comprising (A-2-2) a second acrylonitrile-butadiene-styrene graft copolymer including a rubber polymer having an average particle diameter of 400 nm to 600 nm, and (A-3) an aromatic vinyl compound-vinyl cyanide compound copolymer; (B) 1 to 10 parts by weight of a crosslinked styrene-acrylonitrile copolymer; and (C) 5 to 15 parts by weight of a flame retardant, and a molded article using the same.