A polycarbonate resin composition, comprising: 100 parts by mass of a resin mixture comprising a polycarbonate-polyorganosiloxane copolymer (A-1) comprising, in a main chain thereof, a repeating unit represented by the general formula and a repeating unit represented by the general formula, wherein n=10 to 68, and a polycarbonate-polyorganosiloxane copolymer (A-2) comprising, in a main chain thereof, a repeating unit represented by the general formula and a repeating unit represented by the general formula, wherein n=72 to 150, the component having a content of the repeating unit represented by the general formula in the polycarbonate-polyorganosiloxane copolymer (A-1) of 1.0 mass% to 15.0 mass% and having a content of the repeating unit represented by the general formula in the polycarbonate-polyorganosiloxane copolymer (A-2) of 0.1 mass% to 2.8 mass%; and 0.01 to 0.08 part by mass of at least one kind selected from an alkali metal salt of an organic sulfonic acid and an alkali earth metal salt of an organic sulfonic acid: wherein: R 1 and R 2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkyl group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, -S-, -SO-, -SO 2 -, -O-, or -CO-, and a and b each independently represent an integer of 0 to 4; and R 3 and R 4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and n represents an average number of repetitions. 100 parts by mass of a resin mixture comprising a polycarbonate-polyorganosiloxane copolymer (A-1) comprising, in a main chain thereof, a repeating unit represented by the general formula and a repeating unit represented by the general formula, wherein n=10 to 68, and a polycarbonate-polyorganosiloxane copolymer (A-2) comprising, in a main chain thereof, a repeating unit represented by the general formula and a repeating unit represented by the general formula, wherein n=72 to 150, a polycarbonate-polyorganosiloxane copolymer (A-1) comprising, in a main chain thereof, a repeating unit represented by the general formula and a repeating unit represented by the general formula, wherein n=10 to 68, and a polycarbonate-polyorganosiloxane copolymer (A-2) comprising, in a main chain thereof, a repeating unit represented by the general formula and a repeating unit represented by the general formula, wherein n=72 to 150, the component having a content of the repeating unit represented by the general formula in the polycarbonate-polyorganosiloxane copolymer (A-1) of 1.0 mass% to 15.0 mass% and having a content of the repeating unit represented by the general formula in the polycarbonate-polyorganosiloxane copolymer (A-2) of 0.1 mass% to 2.8 mass%; and 0.01 to 0.08 part by mass of at least one kind selected from an alkali metal salt of an organic sulfonic acid and an alkali earth metal salt of an organic sulfonic acid: wherein: R 1 and R 2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkyl group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, -S-, -SO-, -SO 2 -, -O-, or -CO-, and a and b each independently represent an integer of 0 to 4; and R 3 and R 4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and n represents an average number of repetitions. R 1 and R 2 each independently represent a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms, X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkyl group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, -S-, -SO-, -SO 2 -, -O-, or -CO-, and a and b each independently represent an integer of 0 to 4; and R 3 and R 4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and n represents an average number of repetitions.