The present invention aims to provide a skin-beautifying agent, food, beverage, or feed for skin-beautification which has cosmetic effects such as moisturizing and beautifying the skin as well as preventing skin roughness and wrinkles by oral intake. The present invention further aims to provide a skin-beautifying agent containing a milk-derived phospholipid as an effective ingredient, and to provide food, beverage, or feed for skin-beautification containing the skin-beautifying agent. The milk-derived phospholipid is preferably a composition prepared from milk or milk material containing 40 to 70% by weight of lipid in a total solid content and containing 30% or more by weight of milk-derived phospholipid.