Provided are: a polycarbonate-based resin composition, including: (A) 100 parts by mass of a resin mixture formed of: 30 to 100 mass % of a PC-POS copolymer (A-1) which has constituent units represented by a general formula (I) and a general formula (II), and in which an average repetition number n of organosiloxane constituent units in the general formula (II) is 70 to 500; and 70 to 0 mass % of an aromatic polycarbonate resin (A-2) except the PC-POS copolymer (A-1); (B) 0.01 to 0.15 part by mass of an alkaline (earth) metal salt of an organic sulfonic acid; (C) 0.1 to 1 part by mass of a polytetrafluoroethylene having a fibril-forming ability; and (D) 2 to 15 parts by mass of titanium dioxide particles each having, on an outermost surface thereof, a coating layer formed of a polyol free of a nitrogen atom; a molded article obtained by molding the resin composition; and a structure member for solar photovoltaic power generation formed of the molded article. The polycarbonate-based resin composition, molded article, and structure member for solar photovoltaic power generation each have excellent flame retardancy and excellent tracking resistance without impairing a low-temperature impact characteristic which a PC-POS copolymer has.