PROBLEM TO BE SOLVED: To provide a sleep improvement agent, a non-REM sleep period increasing agent and a sedative agent which give a user a sound sleep feeling.SOLUTION: A sleep improvement agent, a non-REM sleep period increasing agent and a sedative agent comprise a water-soluble antioxidant substance and bivalent metal as active ingredients.COPYRIGHT: (C)2014,JPO&INPIT【課題】熟眠感が得られる睡眠改善剤、ノンレム睡眠時間増加剤及び鎮静剤を提供する。【解決手段】水溶性抗酸化物質と、二価金属と、を有効成分として含有する、睡眠改善剤、ノンレム睡眠時間増加剤及び鎮静剤。【選択図】なし