ABSTRACT The present invention provides a compound represented by formula (I), (in the formula. A1 and A2 each independently represents a carbon atom or a nitrogen atom； X1 represents an unsubstituted or substituted C1 -6 alkyl group or the like: n represents an integer of 0 to 4； R represents an unsubstituted or substituted Cl-6 akylthio group or the like: B and B each independently represent a carbon atom, a nitrogen atom or the like； R and R each independently represent a hydrogen atom, a halogeno group or the like: Ar represents an unsubstituted or substituted C6-I0 aryl group or the like) or a salt thereof, and a hatful organism control agent including thereof
