PROBLEM TO BE SOLVED: To provide a lactic acid bacterium which has high food suitability, is easy to produce, and has the ability to promote the secretion of serotonin. A lactic acid bacterium having the ability to promote the secretion of serotonin and having salt tolerance. [Selection diagram] None【課題】食品適性が高く、製造し易く、更に、セロトニンの分泌を促進する能力を有する乳酸菌を提供する。【解決手段】セロトニンの分泌を促進する能力を有し、耐塩性を有する乳酸菌。【選択図】なし