A pesticidal composition comprising a carboxamide compound represented by following formula (A), wherein Rrepresents a hydrogen atom or a methyl group, and Rrepresents a methyl group, a difluoromethyl group or a trifluoromethyl group, and a diamide compound represented by following formula (B), wherein X, X, X, X and X have the same meanings as defined in the specification, is provided by the present invention, and this composition has an excellent pesticidal effect.
