A pesticidal composition comprising the ester compound represented by formula (I): and the ester compound represented by formula (II): as active ingredients, which has an excellent controlling effect on pests.本發明關於一種有害生物防制組成物,其包含以式(I)表示的酯化合物:及以式(II)表示的酯化合物:作為活性成分,該組成物對有害生物具有極佳的防制效果。