PROBLEM TO BE SOLVED: To provide a 3-alkylthiophenyl oxime ether derivative having excellent pest controlling effects or a salt thereof, and a pest controlling agent using the same as an active ingredient.SOLUTION: There are provided a 3-alkylthiophenyl oxime ether derivative represented by the general formula [I], where R1 represents a C1 to C6 alkyl group mono-substituted or poly-substituted by a halogen atom and the like, R2 represents a halogen atom or a C1 to C6 alkyl group and the like, R3 represents a hydrogen atom or a halogen atom and the like, R4 represents a hydrogen atom or an amino group and the like, R5 represents a hydrogen atom or a C1 to C12 alkyl group, or agriculturally acceptable salt thereof, and a pest controlling agent containing the same as an active ingredient.COPYRIGHT: (C)2014,JPO&INPIT【課題】本発明は、優れた有害生物防除効果を有する3-アルキルチオフェニルオキシムエーテル誘導体又はその塩及びそれを有効成分として含有する有害生物防除剤を提供する。【解決手段】一般式[I]【化1】[式中、R1はハロゲン原子でモノ置換又はポリ置換されたC1~C6アルキル基等を示し、R2はハロゲン原子又はC1~C6アルキル基等を示し、R3は水素原子又はハロゲン原子等を示し、R4は水素原子又はアミノ基等を示し、R5は水素原子又はC1~C12アルキル基等を示す。]で表される3-アルキルチオフェニルオキシムエーテル誘導体又はその農業上許容される塩、及びそれを有効成分として含有する有害生物防除剤。【選択図】なし