An object of the present invention is to provide a biomaterial which has low solubility of inorganic elements in a physiological environment, is excellent in safety, and is easy to mold. A biomaterial containing a compound of the formula (1) or a cured or semi-cured product thereof. R 1 and R 2 are a curable functional group； D 1 and D 2 are a single bond or a linking group； L is a divalent group containing formulas (I) and (II)； and Ar 1 to Ar 3 are aromatic rings The group, X, represents CO, S, SO 2 , and Y represents S, SO 2 , O, CO, COO, CONH. n ≧ 0 integer. [Selection diagram] None【課題】生理的環境下で無機元素の溶出性が低く、安全性に優れ、成形し易い生体用材料を提供する。【解決手段】式（１）の化合物、若しくはその硬化物又は半硬化物を含む生体用材料。Ｒ１、Ｒ２は硬化性官能基、Ｄ１、Ｄ２は単結合又は連結基、Ｌは式（Ｉ）及び（ＩＩ）を含む２価の基、Ａｒ１～Ａｒ３は芳香環からなる基、ＸはＣＯ、Ｓ、ＳＯ２、ＹはＳ、ＳＯ２、Ｏ、ＣＯ、ＣＯＯ、ＣＯＮＨを示す。ｎ≧０整数。【選択図】なし
