The subject of the present invention is to provide a (hetero)arylimidazole compound which has excellent pesticidal activity and/or acaricidal activity, and can be advantageously synthesized industrially. The (hetero)arylimidazole compound of the present invention is a compound represented by formula (I), its N-oxide compound, stereoisomer, tautomer, hydrate, or salt thereof. In formula (I), B 1 is a nitrogen atom or CH, X is a substituted or unsubstituted C3-8 cycloalkyl group, and R 1 is a substituted or unsubstituted C1-6 alkylthio group, or A substituted or unsubstituted C1-6 alkylsulfonyl group, R 2 is a substituted or unsubstituted C1-6 alkyl group, and R is a substituted or unsubstituted C2-6 alkenyl group.本發明之課題在於提供一種有害生物防除活性、其中尤其是殺蟲活性及/或殺蟎活性優異，安全性良好，且可於工業上有利地合成之(雜)芳基咪唑化合物。本發明之(雜)芳基咪唑化合物係式(I)所表示之化合物、其N-氧化物化合物、立體異構物、互變異構物、水合物或其等之鹽。式(I)中，B1為氮原子、或CH，X為經取代或未經取代之C3～8環烷基，R1為經取代或未經取代之C1～6烷硫基、或經取代或未經取代之C1～6烷基磺醯基，R2為經取代或未經取代之C1～6烷基，且R為經取代或未經取代之C2～6烯基。
