Provide is a thermoplastic resin composition from which a resin molded article having high whiteness and mechanical strength can be obtained while retaining the plating properties of the resin molded article. A thermoplastic resin composition comprising a thermoplastic resin, and 1 to 30 parts by weight of a laser direct structuring additive, 0.1 to 20 parts by weight of a titanium oxide and 10 to 230 parts by weight of a glass fiber per 100 parts by weight of the thermoplastic resin, wherein the laser direct structuring additive has an L value of 50 or more, and the glass fiber comprises SiO2 and Al2O3 in a proportion of 60 to 70% by weight of SiO2 and 20 to 30% by weight of Al2O3.