PROBLEM TO BE SOLVED: To provide a hair cosmetic including an active ingredient having excellent living body safety derived from a natural product and also exhibiting excellent effect for maintenance and improvement of the health of hair.SOLUTION: A collagen synthesis promoter of hair papilla cells includes the extract of a Bignoniaceae Tabebuiasp. plant as an active ingredient. A hair cosmetic includes the promoter, and the color tone changes (pigment anomaly and depigmentation) of hair are prevented-improved based on the excellent collagen synthesis promotion action of hair papilla cells that the extract of a Tabebuiasp. plant as an active ingredient has.COPYRIGHT: (C)2014,JPO&INPIT【課題】天然物由来の生体安全性にすぐれ、かつ、毛髪の健康を維持、改善にすぐれた効果を発揮する有効成分を含む毛髪化粧料の提供。【解決手段】本発明は、ノウゼンカズラ科タベブイア属(Tabebuiasp.)植物の抽出物を有効成分とする毛乳頭細胞のコラーゲン合成促進剤、及びこの剤を含む毛髪化粧料で、その有効成分であるタベブイア属の植物の抽出物が有するすぐれた毛乳頭細胞のコラーゲン合成促進作用に基づいて、毛髪の色調変化(色素異常・脱失)を予防・改善する化粧料を提供。【選択図】なし