PROBLEM TO BE SOLVED: To provide a compound useful as s plant disease controlling agent having more excellent performance than a conventional technology, especially, a Rice Blast controlling agent by application on a water surface.SOLUTION: There is disclosed an aminothiazole carboxamide derivative shown by general formula (I), wherein R1 is a hydrogen atom, halogen atom, alkyl group or haloalkyl group R2 and R3 which may be identical or different are a hydrogen atom, alkyl group, formyl group, alkylcarbonyl group, alkoxycarbonyl group, and phenyl group or the like: R4, R5, R6, R7 and R8 which may be identical or different are a hydrogen atom and alkyl group or the like: X1, X2 and X3 which may be identical or different are a hydrogen atom, halogen atom, alkyl group, haloalkyl group, and cycloalkyl group or the like or its salts and plant disease controlling agent containing its derivative.COPYRIGHT: (C)2012,JPO&INPIT【課題】従来技術に比べて優れた性能を有する植物病害防除剤、特に水面施用によるいもち病防除剤として有用な化合物を提供すること。【解決手段】一般式(I)(式中、R1は、水素原子、ハロゲン原子、アルキル基又はハロアルキル基を;R2及びR3は同一又は異なっても良く、水素原子、アルキル基、ホルミル基、アルキルカルボニル基、アルコキシカルボニル基、フェニル基等を;R4、R5、R6、R7及びR8は同一又は異なっても良く、水素原子、アルキル基等を;X1、X2及びX3は同一又は異なっても良く、水素原子、ハロゲン原子、アルキル基、ハロアルキル基、シクロアルキル基等を示す。)で表されるアミノチアゾールカルボキサミド誘導体又はその塩類、並びに該誘導体を含有する植物病害防除剤。【選択図】なし