There is provided an organic sulfur compound having an excellent controllingeffect on harmful arthropods represented by the formula (I): wherein, Rrepresents a C1-C5 haloalkyl group having at least one fluorine atom, Rrepresents a C1-C4 alkyl group optionally substituted with at least one halogenatom or the like, R represents a hydrogen atom or the like, Rrepresents a cyano group or the like, R represents a hydrogen atomor the like, m represents an integer of 1 to 4, and n represents 0, 1 or 2.