PROBLEM TO BE SOLVED: To provide an aromatic heterocyclic bisamide derivative.SOLUTION: Novel heterocyclic compounds represented by formula (I), or salts of the heterocyclic compounds or N-oxides of the heterocyclic compounds are provided. Further, methods of preparing the compounds represented by the formula (I), insecticidal, acaricidal, molluscicidal and nematicidal compositions comprising them, and methods of using them to combat and suppress insect, acarine, mollusc and nematode pests are provided.【課題】芳香族複素環ビスアミド誘導体の提供。【解決手段】式(I)の新規ヘテロ環状化合物、あるいはその塩又はN酸化物。本発明はさらに、式(I)の化合物を調製する方法、それらを含有する殺虫、殺ダニ、殺軟体類及び殺線虫組成物、並びに、昆虫、ダニ、軟体類及び線虫害虫を駆除及び抑制するためのそれらの使用方法に関する。【選択図】なし