An acaricide or insecticide containing as well as an agent for Controlling endoparasites.Claim 1: a compound represented by the formula (1) or a Salt thereof,Wherein: Z represents an oxygen Atom or a Sulfur Atom； a represents a group represented by the formula (2),Or a group represented by the formula (3)； b represents a group represented by the formula (4) where a represents the Group represented by the formula (2),And B represents a group represented by the formula (5) where a represents the Group represented by the formula (3)； in the formula (2), W represents a nitrogen Atom,Or CH； Formulae (2) and (3) * represents a position of Union； X represents a Halogen Group, an alkyl group c u2081 u208b u2086 replaced or not replacedA group alquenilo c u2082 u208b u2086 replaced or not replaced, alquinilo Group c u2082 u208b u2086 replaced or not replaced, a hydroxyl Group, a substituted or unsubstituted c u2081 u208b u2086 alkoxy Group, an amino Group,A group alquilamino c u2081 u208b u2086 replaced or not replaced Formilo Group, an alkyl group, a substituted or non substituted carbonyl c u2081 u208b u2086, a carbonyl Group alquilamino c u2081 u208b u2086 replaced or not replacedA Group alcoxiamino c u2081 u208b u2086 alkyl substituted or non substituted Group, a substituted or unsubstituted Alquiltio, a Group alquilsulfinilo c u2081 u208b u2086 replaced or not replacedA Group alquilsulfonilo c u2081 u208b u2086 replaced or not replaced, a Group alcoxisulfonilo c u2081 u208b u2086 substituted or unsubstituted cycloalkyl Group, a substituted or unsubstituted c u2083 u208b u2088,A c u2086 u208b u2081 u2080 substituted or unsubstituted aryl Group, a substituted or unsubstituted heteroaryl Group, a group ariloxi c u2086 u208b u2081 u2080 replaced or not replaced, a Group heteroariloxi replaced or not replacedA Nitro group or a cyano Group； X represents a Number N and an integer from 0 to 3, and when n is 2 or 3,X is identical or different, r u00b9 represents a substituted or
