PROBLEM TO BE SOLVED: To provide a cognitive function improving agent and a food for improving cognitive function, which are effective in improving brain functions such as memory and learning ability. A cognitive-improving agent containing catechins and ornithine as active ingredients. A food for improving cognitive function, which comprises catechins and ornithine as active ingredients. A cognitive function improving agent and a food for improving cognitive function, wherein the mass ratio of catechins and ornithine is 1:0.1-10. [Selection diagram] None【課題】記憶、学習能力等の脳機能の改善に有効な認知機能改善剤及び認知機能改善用食品の提供。【解決手段】カテキン類及びオルニチンを有効成分とする認知能改善剤。カテキン類及びオルニチンを有効成分とする認知機能改善用食品。カテキン類とオルニチンとの質量比が１：０．１～１０である、認知機能改善剤及び認知機能改善用食品。【選択図】なし
