PROBLEM TO BE SOLVED: To provide a melanin production inhibitor and a skin-whitening cosmetic.SOLUTION: The present invention relates to a melanin production inhibitor represented by chemical formula (I) and comprising sedanolides as an active ingredient, and a skin-whitening cosmetic.COPYRIGHT: (C)2015,JPO&INPIT【課題】メラニン産生抑制剤ならびに美白化粧料を提供する。【解決手段】化学式(I)で表される、セダノリド類を有効成分として含有するメラニン産生抑制剤および美白化粧料。化学式(I)【選択図】図1