PROBLEM TO BE SOLVED: To provide novel pest control agents, in particular insecticides or miticides.SOLUTION: This invention provides thiazole derivatives and pest control agents represented by formula (1) where A1 represents -N(O)m2 or -CR1, R1 and R3 independently represent a hydrogen atom, a halogen atom, C1-C6 alkyl or the like, Ra represents C2-C6 alkynyl or the like, Rb represents -C(O)R7 or the like, R7 represents C1-C6 alkyl or the like, and m1 represents an integer of 0 or 1.COPYRIGHT: (C)2015,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):【化1】[式中、A1は-N(O)m2又は-CR1を表し、R1及びR3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、RaはC2~C6アルキニル等を表し、Rbは-C(O)R7等を表し、R7はC1~C6アルキル等を表し、m1は0又は1の整数を表す。]で表されるチアゾール誘導体及び有害生物防除剤。【選択図】なし