PROBLEM TO BE SOLVED: To provide a melanogenesis inhibitor that can reduce an amount of melanin production and is friendly to cells.SOLUTION: A melanogenesis inhibitor has marine placenta of 0.05-0.15 wt.% relative to a base material, and has collagen of 0.01-0.1 wt.% relative to the marine placenta.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2020,JPO&INPIT【課題】メラニン産生量を抑制できるだけでなく細胞にも優しいメラニン産生抑制剤の提供。【解決手段】海洋性プラセンタを基材に対して0.05~0.15重量%、コラーゲンを海洋性プラセンタに対して0.01~0.1重量%配合したメラニン産生抑制剤。【選択図】図5