A flame retardant resin composition comprising: a base resin containing a polyolefin based compound; a silicone based compound; a fatty acid metal salt; a flame retardant agent containing at least one kind selected from the group consisting of calcium carbonate particles and silicate compound particles; a hindered phenol based compound; and a hindered amine based compound, wherein the silicone based compound is blended at a ratio of 0.1 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, the fatty acid metal salt is blended at a ratio of 0.1 part by mass or more and 20 parts by mass or less relative to 100 parts by mass of the base resin, the flame retardant agent is blended at a ratio of 5 parts by mass or more and 200 parts by mass or less relative to 100 parts by mass of the base resin, the hindered phenol based compound is blended at a ratio of 0.05 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, the hindered amine based compound is blended at a ratio of 0.05 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, and the hindered amine based compound has a monovalent group represented by the following formula or a divalent group represented by the following formula: (in the formula, R 1 represents an alkyl group or alkoxy group having 1 to 30 carbon atoms and R 2 to R 5 each independently represent an alkyl group having 1 to 6 carbon atoms) (in the formula, R 6 represents an alkylene group having 1 to 30 carbon atoms and R 7 to R 10 each independently represent an alkyl group having 1 to 6 carbon atoms). a base resin containing a polyolefin based compound; a silicone based compound; a fatty acid metal salt; a flame retardant agent containing at least one kind selected from the group consisting of calcium carbonate particles and silicate compound particles; a hindered phenol based compound; and a hindered amine based compound, wherein the silicone based compound is blended at a ratio of 0.1 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, the fatty acid metal salt is blended at a ratio of 0.1 part by mass or more and 20 parts by mass or less relative to 100 parts by mass of the base resin, the flame retardant agent is blended at a ratio of 5 parts by mass or more and 200 parts by mass or less relative to 100 parts by mass of the base resin, the hindered phenol based compound is blended at a ratio of 0.05 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, the hindered amine based compound is blended at a ratio of 0.05 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, and the hindered amine based compound has a monovalent group represented by the following formula or a divalent group represented by the following formula: (in the formula, R 1 represents an alkyl group or alkoxy group having 1 to 30 carbon atoms and R 2 to R 5 each independently represent an alkyl group having 1 to 6 carbon atoms) (in the formula, R 6 represents an alkylene group having 1 to 30 carbon atoms and R 7 to R 10 each independently represent an alkyl group having 1 to 6 carbon atoms).