PROBLEM TO BE SOLVED: To provide a diaryl azole compound having excellent insecticidal activity and/or acaricidal activity, excellent in safety, and capable of being industrially advantageously synthesized, and a pest control agent containing the same as an active ingredient.SOLUTION: There are provided a compound represented by the formula (I), wherein A1 and A2 represent each independently a carbon atom or a nitrogen atom； X1 represent a C1 to 6 alkyl group being unsubstituted or having a substituent or the like； n represents an integer of 0 to 4； R1 represents a C1 to 6 alkylthio group being unsubstituted or having a substituent or the like； B1 and B4 represent each independently a carbon atom, a nitrogen atom or the like； R2 and R3 represent each independently a hydrogen atom, a halogeno group or the like； and Ar represents as C6 to 10 aryl group being unsubstituted or having a substituent or the like, or a salt thereof, and a pest control agent containing the compound or the salt.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】優れた殺虫活性および／または殺ダニ活性を有し、安全性に優れ、かつ工業的に有利に合成できるジアリールアゾール化合物ならびにこれを有効成分として含有する有害生物防除剤。【解決手段】式（I）（式中、Ａ1およびＡ2は、それぞれ独立に、炭素原子または窒素原子；Ｘ1は、無置換のもしくは置換基を有するＣ１～６アルキル基等；ｎは０～４のいずれかの整数；Ｒ1は、無置換のもしくは置換基を有するＣ１～６アルキルチオ基等；Ｂ１およびＢ４は、それぞれ独立に、炭素原子、窒素原子等；Ｒ２およびＲ３は、それぞれ独立に、水素原子、ハロゲノ基等；Ａｒは、無置換のもしくは置換基を有するＣ６～１０アリール基等を示す）で表される化合物またはその塩、および該化合物または塩を含む有害生物防除剤。【選択図】なし
