Provided is a harmful arthropods controlling composition comprising flonicamid, tricyclazole and one or more plant diseases controlling compound selected from the group consisting of flutonail and pencycuron.一種有害節肢動物防治組成物,係含有氟尼胺(flonicamid),三賽唑(Tricyclazole),及由福多寧(flutolanil)及賓克隆(pencycuron)所成的群中所選出之至少1種以上的植物病害防治化合物。