PROBLEM TO BE SOLVED: To provide a skin external preparation for hair excellent in stability so that no precipitation derived from a stigmastanol glycoside (number of sugars: 2-5) happens in the preparation in any cases when left standing.SOLUTION: A skin external preparation for a hair comprises: a stigmastanol glycoside and a bark extract of Tabebuia Impetiginosa of the genus Tabebuia in the family Bignoniaceae. The skin external preparation for a hair prevents precipitation derived from the stigmastanol glycoside in any cases when left standing by including the bark extract of Tabebuia Impetiginosa.