The present invention relates to an arthropod pest control composition which contains a compound represented in formula (I) [in the formula, each symbol represents the definition in the description], a compound represented in formula (II) [in the formula, A1 represents a methyl group and A2 represents a chlorine atom or a cyano group], and one or more compounds selected from group (A)； and also relates to an arthropod pest control method based on the arthropod pest control composition. Group (A): isotianil, probenazole, tiadinil, tricyclazole, orysastrobin and pyroquilon. This arthropod pest control composition has excellent control effect for arthropod pests.本發明係關於含有式(I)所示之化合物、式(II)所示之化合物及選自群(A)中1種以上之化合物之有害節足動物防治組成物及藉由該有害節足動物防治組成物之有害節足動物防治方法，〔式中，各記號表示說明書中所記載之定義〕〔式中，A1表示甲基，A2表示氯原子或氰基〕。群(A)：由異噻菌胺(Isotianil)、撲殺熱(Probenazole)、醯菌胺(Tiadinil)、三環唑(Tricyclazole)、肟醚菌胺(orysastrobin)及百快隆(pyroquilon)所成之群。本發明之有害節足動物防治組成物係對於有害節足動物具有優異之防治效力。
