PROBLEM TO BE SOLVED: To obtain a phytotoxicity reducing agent and a herbicide composition containing the same.SOLUTION: The herbicide composition having reduced phytotoxicity is obtained by combining (a) a herbicidal compound with (b) at least one kind of a substance having a phytotoxicity reducing action selected from the group consisting of a benzisothiazolinone derivative, benzamide derivative, benzothiazole derivative, benzoxazolinone derivative, benzoxazine derivative, Tiadinil (R), isoprothiolane, hexamethylenetetramine, potassium oxalate and a vanillin derivative.COPYRIGHT: (C)2008,JPO&INPIT【課題】薬害軽減剤及びそれを含有する除草剤組成物を提供すること。【解決手段】(a)除草性化合物と、(b)ベンゾイソチアゾリノン誘導体、ベンズアミド誘導体、ベンゾチアゾール誘導体、ベンゾオキサゾリノン誘導体、ベンゾオキサジン誘導体、チアジニル、イソプロチオラン、ヘキサメチレンテトラミン、シュウ酸カリウム及びバニリン誘導体より成る群から選ばれる少なくとも1種の薬害軽減作用物質を組み合わせて成る薬害軽減された除草剤組成物。【選択図】なし