PROBLEM TO BE SOLVED: To provide a novel liver function disorder inhibitor, a food and drink product, and a pharmaceutical preparation which are derived from a natural product, and a method for producing a liver function disorder inhibitor.SOLUTION: A liver function disorder inhibitor contains a soybean fermented product by fungus containing at least one type of Rhizopus stolonifer and Rhizopus oryzae.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】天然物由来の新規な肝機能障害抑制剤、飲食品、医薬品及び肝機能障害抑制剤の製造方法を提供する。【解決手段】本発明の肝機能障害抑制剤は、Rhizopus stolonifer及びRhizopus oryzaeのうちの少なくとも1種類を含む菌類による大豆発酵物を含む。【選択図】なし