PROBLEM TO BE SOLVED: To provide a novel pest controlling agent, especially an insecticidal agent or an acaricidal agent.SOLUTION: A pyrazole derivative and a pest controlling agent are represented by formula (1), where B is a pyrazole ring represented by following structure formula, A1 is -N(-O)m2 or -CR1, A2 is a heterocycle, R1 is a hydrogen atom, halogen atom, cyano, nitro, C1 to C6 alkyl or the like, R2 is a halogen atom, cyano, nitro, C1 to C6 alkyl or the like, R3 and R4 are each independently a hydrogen atom, halogen atom, C1 to C6 alkyl or the like, m1 and m2 are each independently an integer of 0 or 1.COPYRIGHT: (C)2014,JPO&INPIT【課題】新規な有害生物防除剤、特に殺虫剤又は殺ダニ剤を提供する。【解決手段】式(1):[式中、Bは、下記の構造式で表されるピラゾール環を表し、A1は-N(-O)m2又は-CR1を表し、A2は複素環を表し、R1は、水素原子、ハロゲン原子、シアノ、ニトロ、C1~C6アルキル等を表し、R2は、ハロゲン原子、シアノ、ニトロ、C1~C6アルキル等を表し、R3、R4は各々独立して水素原子、ハロゲン原子、C1~C6アルキル等を表し、m1及びm2は、各々独立して0又は1の整数を表す。]で表されるピラゾール誘導体及び有害生物防除剤。【選択図】なし
