Disclosed is a thermoplastic resin composition which includes a thermoplastic resin including a polycarbonate resin; a siloxane compound represented by Formula 1; and surface-modified hydrophobic silica. The thermoplastic resin composition exhibits excellent properties in terms of impact resistance, heat resistance, scratch resistance, surface gloss, mar resistance, and the like. wherein R 1 and R 2 are a C 1 to C 5 alkyl group; R 3 and R 4 are a C 2 to C 10 alkylene group; A 1 and A 2 are a glycidoxy group, an epoxy group, an amine group, a hydroxyl group, a hydrogen atom, a vinyl group, a (meth)acryloyl group, or an aryl group; and n is an integer from 2 to 80.