PROBLEM TO BE SOLVED: To provide a sleep quality improvement tool capable of efficiently improving sleep quality which is important for maintaining health of a body and mind.SOLUTION: A sleep quality improvement tool comprises: an oral administration agent (X) in which chlorogenic acid or salt of it is included as an active principle and a thermal sheet (Y) having a heating part which generates vapor when generating heat, and an external body, and is applied on skin of an upper one-third portion of a body, they are combined in use.SELECTED DRAWING: None
