PROBLEM TO BE SOLVED: To obtain high strength in a use to harden an artificial bone material in a liquid.SOLUTION: The artificial bone material which contains sodium calcium phosphate having a ratio of calcium to sodium within a range of 1/1 or above and 3/1 or below and contains &alpha tricalcium phosphate having a mass fraction more than 0.1 and equal to or less than 0.5 is provided.COPYRIGHT: (C)2012,JPO&INPIT【課題】液中で硬化させる用途においても高い強度を得る。【解決手段】カルシウム/ナトリウム比率が1/1以上3/1以下の範囲内のリン酸ナトリウムカルシウムを含み、質量分率0.1より大きく0.5以下のαリン酸三カルシウムを含む人工骨材料を提供する。【選択図】図1