The present invention provides a pest control composition having an excellent controlling effect on pests, which comprises a combination of an ester compound represented by the formula (1):and a cyclic compound represented by the formula (2a):[wherein X1 represents an oxygen atom or a C1-C8 alkylimino group, X2 represents a methylene group, an oxygen atom or a C1-C8 alkylimino group, and R1 represents a hydrogen atom or a methyl group], and/or a cyclic compound represented by the formula (2b):[wherein R2 represents a hydrogen atom or a methyl group].本發明提供一種具有優越之有害生物防治效果之農藥組成物，其包含如式(1)代表之酯化合物：及如式(2a)代表之環狀化合物[其中X1代表氧原子或C1-C8烷基亞胺基，X2代表亞甲基、氧原子或C1-C8烷基亞胺基，及R1代表氫原子或甲基]，及/或如式(2b)代表之環狀化合物之組合：[其中R2代表氫原子或甲基]。
