To provide a pest control composition having excellent pest control effect, and a pest control method.SOLUTION: A pest control composition contains a condensed heterocyclic compound represented by formula (1) or an N-oxide thereof, and at least one compound selected from N, N-diethyl-m-toluamide and sec-butyl-2-(2-hydroxyethyl) piperidine-1-carboxylate. [Ais -NR- or the like； Ais N or =CR-； Ais N or =CR-； Ris a substituted/unsubstituted chain hydrocarbon group or alicyclic hydrocarbon group； R-Rindependently represent a chain hydrocarbon group or a phenyl group substituted/unsubstituted with a group substituted/unsubstituted with halogen； Rand Rindependently represent a chain hydrocarbon group, a phenyl group or a heterocyclic group substituted/unsubstituted with a group substituted/unsubstituted with halogen； Ris a chain hydrocarbon group or the like substituted/unsubstituted with a group substituted/unsubstituted with halogen； n is an integer of 0-2].SELECTED DRAWING: None【課題】有害生物に対する優れた防除効力を有する有害生物防除組成物、及び有害生物防除方法の提供。【解決手段】式（１）で示される縮合複素環化合物、又はそのＮ－オキシドと、Ｎ，Ｎ－ジエチル－ｍ－トルアミド及びｓｅｃ－ブチル－２－（２－ヒドロキシエチル）ピペリジン－１－カルボキシラートから選ばれる少なくとも１種の化合物とを含有する有害生物防除組成物。［Ａ１は－ＮＲ７－等；Ａ２はＮは＝ＣＲ８－；Ａ３はＮ又は＝ＣＲ９－；Ｒ１は置換／非置換の鎖式炭化水素基又は脂環式炭化水素基；Ｒ２～Ｒ４は各々独立にハロゲンで置換／非置換の基で置換／非置換の鎖式炭化水素基又はフェニル基；Ｒ５及びＲ６は各々独立にハロゲンで、置換／非置換の基で置換／非置換の鎖式炭化水素基、フェニル基又は複素環基；Ｒ７はハロゲンで置換置換／非置の基で置換／非置換の鎖式炭化水素基等；ｎは０～２整数］【選択図】なし
