PROBLEM TO BE SOLVED: To provide a 1-heterodiene compound which is excellent in insecticidal activity and / or acaricidal activity, is excellent in safety, and can be synthesized industrially advantageously. SOLUTION: A compound represented by the formula (I) or a salt thereof. (Q 1 is a substituted / unsubstituted C6-10 aryl group； Q 2 is a substituted / unsubstituted C1-6 alkyl group, etc .； R 1 is H, A and B are independently O or S； D is substituted / Unsubstituted methylene group, carbonyl group or O； E is a substituted / unsubstituted benzene ring) [Selection diagram] None【課題】殺虫活性および／または殺ダニ活性に優れ、安全性に優れ、かつ工業的に有利に合成できる１－ヘテロジエン化合物の提供。【解決手段】式（I）で表される化合物又はその塩。（Ｑ1は置換／無置換のＣ６～１０アリール基；Ｑ2は置換／無置換のＣ１～６アルキル基等；Ｒ1はＨ、Ａ及びＢは夫々独立にＯ又はＳ；Ｄは置換／無置換のメチレン基、カルボニル基又はＯ；Ｅは、置換／無置換のベンゼン環）【選択図】なし
