[Technical Problem]To provide a novel imino derivative capable of being an insecticide compound having excellent characteristics such as sustained effects and broad spectrum.[Solution to Problem]To provide an imino derivative represented by Formula (1).wherein "Ar" denotes a heterocyclic group which may have a substituent on the ring, "X" denotes a sulfur atom or CH2, NR "R" denotes a hydrogen atom or an alkyl group "Y" is selected from COR1 or CONR3R4, CONHCOR5, CO2R9 and each of "R1", "R3", "R4", "R5", and "R9" denotes a hydrogen atom or a certain substituent.
