Thermoplastic resin composition

A thermoplastic resin molded article comprising:

• a first copolymer including a unit derived from an aromatic vinyl-based monomer and a unit derived from a vinyl cyan-based monomer;
• a second copolymer including a unit derived from an alkyl (meth)acrylate-based monomer, a unit derived from an aromatic vinyl-based monomer, and a unit derived from a vinyl cyan-based monomer;
• a third copolymer including a conjugated diene-based polymer with an average particle diameter of 0.25 to 0.35 μm, a unit derived from an aromatic vinyl-based monomer, and a unit derived from a vinyl cyan-based monomer;
• and
• a fourth copolymer including a conjugated diene-based polymer with an average particle diameter of 0.05 to 0.15 μm, a unit derived from an aromatic vinyl-based monomer, and a unit derived from a vinyl cyan-based monomer,
• wherein a refractive index of a matrix part including the first copolymer and the second copolymer and a refractive index of an impact modifying part including the third copolymer and the fourth copolymer differ by 0.01 to 0.04,
• wherein the thermoplastic resin of the molded article includes 60 to 70 wt % of the first copolymer and 10 to 20 wt % of the second copolymer.