PROBLEM TO BE SOLVED: To provide a melanogenesis inhibitor and a bleaching cosmetic.SOLUTION: The invention relates to the melanogenesis inhibitor and the bleaching cosmetic comprising loliolide. And the invention relates to a thyrosinase inhibitor comprising the loliolide.COPYRIGHT: (C)2008,JPO&INPIT【課題】メラニン産生抑制剤並びに美白化粧料の開発【解決手段】ロリオライドを含有するメラニン産生抑制剤又は美白化粧料。【選択図】図1