PROBLEM TO BE SOLVED: To provide a neuraminidase inhibitor derived from a Ganoderma lingzhi extract, food products, cosmetics and pharmaceuticals (anti-influenza agents) comprising the neuraminidase inhibitor, and a method for producing the neuraminidase inhibitor.SOLUTION: A neuraminidase inhibitor has the effect of inhibiting the activity of neuraminidase (NA), the neuraminidase inhibitor comprising an organic solvent extract from Ganoderma lingzhi or a triterpenoid contained therein, or an aqueous solvent extract from Ganoderma lingzhi. There are also provided food products, cosmetics and pharmaceuticals (anti-influenza agents) comprising the same.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】霊芝の抽出物に由来するノイラミニダーゼ阻害剤、これを利用した食品、化粧料および医薬品(抗インフルエンザ剤)、ならびに該ノイラミニダーゼ阻害剤の製造方法の提供。【解決手段】霊芝(Ganodermalingzhi)からの有機系溶媒抽出物もしくはこれに含まれるトリペノイド類、または霊芝からの水系溶媒抽出物を含み、ノイラミニダーゼ(NA)の活性を阻害する作用を有するノイラミニダーゼ阻害剤、これを含有する食品、化粧料および医薬品(抗インフルエンザ剤)。【選択図】なし