PROBLEM TO BE SOLVED: To provide a drug or food and drink for improving brain function.SOLUTION: The invention relates to a brain function improving agent including a milk casein-derived peptide as an active ingredient, and the food and drink for improving the brain function including the milk casein-derived peptide.COPYRIGHT: (C)2012,JPO&INPIT【課題】脳機能を改善するための医薬又は飲食品を提供する。【解決手段】牛乳カゼイン由来ペプチドを有効成分として含有する脳機能改善剤及び牛乳カゼイン由来ペプチドを含有する脳機能改善用飲食品。【選択図】 図2