The present invention provides a composition for controlling pests having an excellent control efficacy on pests.A composition for controlling pests comprising a compound represented by the formula (1): wherein each of symbols are the same as defined in the Description, or N-oxide thereof; and a compound represented by the formula (2): wherein each of symbols are the same as defined in the Description; shows an excellent controlling efficacy on pests.本發明係提供一種對有害生物具有優異的防治效力之有害生物防治組成物,其係含有式(1)所示之化合物或其N-氧化物與式(2)所示之化合物,式(1):[式中,各記號表示說明書中記載的定義]式(2):[式中,各記號表示說明書中記載的定義]。