To provide novel insecticidal, miticidal, nematicidal, molluscicidal, or germicidal composition.SOLUTION: There is provided a novel insecticidal, miticidal, nematicidal, molluscicidal, or germicidal composition containing one or two kind of active compound I selected from a condensed heterocyclic compound represented by the formula (1), a salt thereof or N-oxide thereof, and one or two kind of active compound II selected from known insecticide. Q is Q1 or Q3, Ais Cto Calkyl, Aand Aare each independently N or the like, Ris Cto Calkyl, Ris halo(Cto C)alkyl or the like, Rand Rare H, Y2 to Y4 are each independently H, a halogen atom, or the like, and n is an integer of 0 to 2.SELECTED DRAWING: None【課題】新規な殺虫、殺ダニ、殺線虫、殺軟体動物、殺菌組成物の提供。【解決手段】式（１）で表される縮合複素環化合物、その塩又はそれらのＮ－オキシドより選ばれる１種又は２種の活性化合物Iと、公知の殺虫剤などより選ばれる１種又は２種以上の活性化合物IIを含有する、新規な殺虫、殺ダニ、殺線虫、殺軟体動物、殺菌組成物。［Ｑは、Ｑ１又はＱ３；Ａ１ａはＣ１～Ｃ６アルキル；Ａ４及びＡ５は、各々独立に、Ｎ等；Ｒ１はＣ１～Ｃ６アルキル；Ｒ３はハロ（Ｃ１～Ｃ６）アルキル等；Ｒ４及びＲ５はＨ；Ｙ２～Ｙ４は、各々独立して、Ｈ、ハロゲン原子等；ｎは、０～２の整数］【選択図】なし
