PROBLEM TO BE SOLVED: To provide an external preparation for the skin, containing a compound exhibiting antiaging activities, as an active ingredient in a state of being dissolved in water, and exhibiting high preservability and high skin-penetrating properties.SOLUTION: The external preparation for the skin includes protein particles and pterostilbene. The external preparation for the skin is used as an antiaging agent.COPYRIGHT: (C)2013,JPO&INPIT【課題】有効成分として抗老化作用を発揮する化合物を水溶化させた状態で含有し、高い保存性及び高い皮膚浸透性を示す皮膚外用剤を提供すること。【解決手段】タンパク質粒子及びプテロスチルベンを含有する皮膚外用剤。【選択図】なし