A composition comprising a carboxamide compound represented by following formula (I), wherein R represents a hydrogen atom or a methyl group, and Rrepresents a methyl group, a difluoromethyl group or a trifluoromethyl group, and one or more neonicotinoid compound selected from group (A) consisting of acetamiprid, clothianidin, dinotefuran, imidacloprid, nitenpyram thiacloprid and thiamethoxam possesses an excellent pesticidal effect.