#$%^&*AU2011203502A120120216.pdf#####ABSTRACT OF THE DISCLOSURE The present invention provides an animal ectoparasitecontrolling agent containing as an active ingredient a 5 hydrazide compound represented by the formula (1) CI R3 R4 N'R6 N- 0 CF 3 0 wherein R3 represents a fluorine atom, a chlorine atom, a bromine atom, a methyl group, an ethyl group or a hydrogen atom, R5 and R6 are the same or different each 10 other and each represents a methyl group or a hydrogen atom, R 4 represents a C3-C6 cycloalkyl group, which shows excellent controlling effects on animal ectoparasites.