PROBLEM TO BE SOLVED: To provide a low protein rice-producing method for using polished rice as rice to be processed, producing intended low protein rice without requiring a long time, with good efficiency of splitting protein which polished rice contains.SOLUTION: This method for producing the low protein rice comprises processing polished rice with protein splitting enzyme to split protein which polished rice contains and decrease protein. In more details, the method comprises, prior to processing polished rice with protein splitting enzyme, processing polished rice with plant tissue disintegrating enzyme, performing the process of polished rice with plant tissue disintegrating enzyme in clean water or electrolytic produced acidic water, and performing the process of polished rice with protein splitting enzyme in clean water or electrolytic produced alkaline water.COPYRIGHT: (C)2009,JPO&INPIT【課題】白米を被処理米とする低タンパク質米の製造方法であって、白米が含有するタンパク質の分解効率がよくて、意図するタンパク質米を長時間を要することなく製造することができる方法を提供する。【解決手段】白米をタンパク質分解酵素で処理して白米が含有するタンパク質を分解してタンパク質を低減させる低タンパク質米の製造方法であって、白米をタンパク質分解酵素で処理するのに先立って、植物組織崩壊酵素で処理するものであり、白米の植物組織崩壊酵素による処理は浄水または電解生成酸性水中で行い、白米のタンパク質分解酵素による処理は浄水または電解生成アルカリ性水中で行う。【選択図】 なし