THERE IS PROVIDED AN ORGANIC SULFUR COMPOUND HAVING AN EXCELLENT CONTROLLING EFFECT ON HARMFUL ARTHROPODS WHICH IS REPRESENTED BY FORMULA (I): WHEREIN R1 REPRESENTS A C3-C6 HALOALKYL GROUP HAVING AT LEAST ONE FLUORINE ATOM AND AT LEAST ONE ATOM SELECTED FROM GROUP CONSISTING OF A CHLORINE ATOM, A BROMINE ATOM AND AN IODINE ATOM, R2 REPRESENTS A CYANO GROUP AND THE LIKE, R3 REPRESENTS A HYDROGEN ATOM, A HALOGEN ATOM OR A CL-C4 ALKYL GROUP, R4 REPRESENTS A C1-C5 FLUOROALKYL GROUP, AND N REPRESENTS 0, 1 OR 2.