PROBLEM TO BE SOLVED: To provide an ultraviolet resistance improving agent that increases the resistance of skin to ultraviolet light and can alleviate or suppress damage to the skin caused by exposure to the ultraviolet light by oral ingestion.SOLUTION: There is provided an oral ultraviolet resistance improving agent including diisopropyl sebacate, acetyltryptophan or a salt thereof, or azelaic acid or a salt thereof as active ingredients.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】経口摂取により、皮膚の紫外線に対する抵抗力を高め、紫外線の暴露により生じる皮膚のダメージを軽減又は抑制できる、紫外線抵抗性向上剤の提供。【解決手段】セバシン酸ジイソプロピル、アセチルトリプトファン若しくはその塩又はアゼライン酸若しくはその塩を有効成分とする経口紫外線抵抗性向上剤。【選択図】なし