Provided is a harmful arthropods controlling composition comprising flonicamd, one or more planthoppers comtrolling compound selected from group(A), and one or more rice blast controlling compound selected from group(B).Group(A): consisting of clothianidin, imidocloprid, dinotefuran, thiamethoxam, fipronil and pymetrozine.Group(B): consisting of isotianil, probenazole, tiadinil, tricyclazole, pyroquilon, thiophanate methyl, orysastrobin and azoxystrobin.一種有害節肢動物防治組成物,係含有氟尼胺(flonicamid),由群(A)所選的1種以上的飛蝨類防治化合物,及由群(B)所選的1種以上的稻熱病防治化合物的組成物。群(A):可尼丁(clothianidin)、益達胺(imidacloprid)、達特南(dinotefuran)、賽速安(thiamethoxam)、芬普尼(fipronil)及派滅淨(pymetrozine)所成之群。群(B):異噻菌胺(isotianil)、撲殺熱(probenazole)、噻醯菌胺(tiadinil)、三賽唑(tricyclazole)、百快隆(pyroquilon),甲基多保淨(thiophanate methyl)、肟醚菌胺(orysastrobin)及亞托敏(azoxystrobin)所成之群。