PROBLEM TO BE SOLVED: To provide a composition exhibiting excellent effects against pests.SOLUTION: There is provided the pesticidal composition comprising a carboxamide compound represented by following formula (A) (wherein, R1 represents a hydrogen atom or a methyl group, and R2 represents a methyl group, a difluoromethyl group or a trifluoromethyl group), and a diamide compound represented by following formula (B), [wherein X1 represents a hydrogen atom or a 1 to 3C alkyl group X2 represents a 1 to 3C alkyl group, a (3 to 5C cycloalkyl) 1 to 3C alkyl group, a (1 to 3C alkoxy) carbonylamino group or a (1 to 3C alkoxy) carbonyl (1 to 3C alkyl) amino group X3 is a halogen atom or a 1 to 3C alkyl group X4 is a cyano group, a halogen atom or a 1 to 3C alkyl X5 is a halogen atom or a 1 to 3C alkyl group].COPYRIGHT: (C)2012,JPO&INPIT【課題】有害生物に対する優れた防除効果を示す組成物を提供すること。【解決手段】式(A)及び式(B)で示される化合物を含有する有害生物防除組成物。【選択図】なし