PROBLEM TO BE SOLVED: To provide a hair restorer that is excellent in hair restoring effect and storage stability at low temperature.SOLUTION: A hair restorer has stock solution and carbon dioxide. The stock solution has component (A): minoxidil of 0.7%(mass/volume) or more and 10%(mass/volume) or less relative to the stock solution, component (B): ethanol of 40%(mass/volume) or more relative to the stock solution, and component (C): water. The content of carbon dioxide is 0.5%(mass/volume) or more and 5%(mass/volume) or less relative to the stock solution.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】育毛効果感および低温での保存安定性に優れる育毛剤を提供する。【解決手段】原液および二酸化炭素を含有する育毛剤であって、原液が、成分(A):原液に対して0.7%(質量/体積)以上10%(質量/体積)以下のミノキシジル、成分(B):原液に対して40%(質量/体積)以上のエタノール、および成分(C):水を含み、原液に対して二酸化炭素を0.5%(質量/体積)以上5%(質量/体積)以下含有する、育毛剤。【選択図】なし