PROBLEM TO BE SOLVED: To provide agents which do not become a burden on routine ingestion, and can enhance concentration by increasing the release of α2 wave, and to provide foods and drinks containing the agents.SOLUTION: The present invention provides a concentration improver containing theanine, pyroglutamic acid and caffeine, and a food and drink containing the concentration improver.SELECTED DRAWING: None【課題】日常的な摂取にも負担にならず、かつ、α2波の放出を増強させて集中力を高めることができる剤、及び前記剤を含む飲食品を提供する【解決手段】テアニン、ピログルタミン酸及びカフェインを含有する集中力向上剤および前記集中力向上剤を含有する飲食品。【選択図】なし