There is provided an organic sulfur compound having an excellent controllingeffect on harmful arthropods represented by the formula (I): wherein, Rrepresents a C3-C10 alkenyl group optionally substituted with at least one halogenatom, a C3-C10 alkynyl group optionally substituted with at least one halogenatom, or the like, R represents a cyano group or the like, Rrepresents a hydrogen atom, a halogen atom or a C1-C4 alkyl group, Rrepresents a C1-C5 fluoroalkyl group, and n represents 0, 1 or 2.