PROBLEM TO BE SOLVED: To provide a bone differentiation inducer that promotes differentiation from a mesenchymal stem cell to an osteoblast.SOLUTION: The present invention provides a bone differentiation inducer that differentiates a mesenchymal stem cell to an osteoblast, the bone differentiation inducer comprising a rosin derivative.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】間葉系幹細胞から骨芽細胞への分化を促進させる骨分化誘導因子を提供すること。【解決手段】 間葉系幹細胞を骨芽細胞へ分化させる骨分化誘導因子であって、ロジン誘導体を含む、骨分化誘導因子。【選択図】 なし