A polycarbonate resin composition, comprising: 100 parts by mass of a resin mixture comprising 30 mass% to 100 mass% of a polycarbonate-polyorganosiloxane copolymer (A-1) having a repeating unit represented by the general formula and a repeating unit represented by the general formula, and having an average chain length of a polyorganosiloxane moiety of from 70 to 500, and 70 mass% to 0 mass% of an aromatic polycarbonate resin (A-2) except the polycarbonate-polyorganosiloxane copolymer (A-1); 0.08 part by mass to 0.3 part by mass of a silsesquioxane; 0.05 part by mass to 0.2 part by mass of an alkaline metal salt and/or an alkaline earth metal salt of an organic sulfonic acid; 0 parts by mass to 0.3 part by mass of a polytetrafluoroethylene having a fibril-forming ability; 1 part by mass to 10 parts by mass of titanium dioxide; and 0.1 part by mass to 3 parts by mass of carbon black: wherein in the formula, R 1 and R 2 each independently represent an alkyl group or 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, -S-, -SO-, -SO 2 -, -O-, or -CO-, and a and b each independently represent an integer of from 0 to 4, and in the formula, 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. 100 parts by mass of a resin mixture comprising 30 mass% to 100 mass% of a polycarbonate-polyorganosiloxane copolymer (A-1) having a repeating unit represented by the general formula and a repeating unit represented by the general formula, and having an average chain length of a polyorganosiloxane moiety of from 70 to 500, and 70 mass% to 0 mass% of an aromatic polycarbonate resin (A-2) except the polycarbonate-polyorganosiloxane copolymer (A-1); 30 mass% to 100 mass% of a polycarbonate-polyorganosiloxane copolymer (A-1) having a repeating unit represented by the general formula and a repeating unit represented by the general formula, and having an average chain length of a polyorganosiloxane moiety of from 70 to 500, and 70 mass% to 0 mass% of an aromatic polycarbonate resin (A-2) except the polycarbonate-polyorganosiloxane copolymer (A-1); 0.08 part by mass to 0.3 part by mass of a silsesquioxane; 0.05 part by mass to 0.2 part by mass of an alkaline metal salt and/or an alkaline earth metal salt of an organic sulfonic acid; 0 parts by mass to 0.3 part by mass of a polytetrafluoroethylene having a fibril-forming ability; 1 part by mass to 10 parts by mass of titanium dioxide; and 0.1 part by mass to 3 parts by mass of carbon black: wherein in the formula, R 1 and R 2 each independently represent an alkyl group or 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, -S-, -SO-, -SO 2 -, -O-, or -CO-, and a and b each independently represent an integer of from 0 to 4, and in the formula, 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. in the formula, R 1 and R 2 each independently represent an alkyl group or 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, -S-, -SO-, -SO 2 -, -O-, or -CO-, and a and b each independently represent an integer of from 0 to 4, and in the formula, 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.