PROBLEM TO BE SOLVED: To provide a melanogenesis inhibitor which can effectively prevent and treat pigmentation such as skin discoloration and freckles.SOLUTION: The present invention provides a melanogenesis inhibitor comprising a compound included in Pteris dispar Kunze extract, the compound illustrated by the formula, or a salt thereof as an active ingredient and a method for producing the same.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】シミやソバカス等の色素沈着を効果的に予防、治療することができるメラニン生成抑制剤の提供。【解決手段】アマクサシダ抽出液に含まれる下式で例示される化合物又はその塩を有効成分とするメラニン生成抑制剤及びその製造方法。【選択図】なし