Transparent thermoplastic resin composition, molded article obtained therefrom, and method of producing transparent thermoplastic resin composition

An object of the present invention is to provide a transparent thermoplastic resin composition which has both an excellent impact resistance and fluidity while maintaining a high degree of transparency, and a molded article thereof. The gist of the present invention for achieving the above-mentioned object is to provide a transparent thermoplastic resin composition including: a graft copolymer (A) obtained by graft-copolymerizing a monomer mixture (a) that contains at least an aromatic vinyl monomer (a1) and a (meth)acrylic acid ester monomer (a2), in the presence of a rubbery polymer (r); a vinyl copolymer (B) obtained by copolymerizing a monomer mixture (b) that contains at least an aromatic vinyl monomer (b1), a (meth)acrylic acid ester monomer (b2) and a vinyl cyanide monomer (b3); the following ester compound (C); and the following ester compound (D); wherein the ester compound (C) is a hydrogenated product of a triglyceride of an acid(s) selected from the group consisting of palmitic acid, stearic acid,