There is provided a halogen-containing organosulfur compound having a controlling effect on arthropod pests represented by the formula (I): wherein m represents 0, 1 or 2 n represents 0, 1 or 2 A represents an optionally substituted 3- to 8-membered saturated heterocyclic group Q represents a fluorine atom or a C1-C5 haloalkyl group having at least one fluorine atom R1, R1a and R3 independently represent an optionally halogenated C1-C4 chain hydrocarbon group, etc. R2, R2a and R4 independently represent an optionally halogenated C1-C4 chain hydrocarbon group, etc.
