PROBLEM TO BE SOLVED: To provide biocompatible medical materials excellent in sustained release properties of inclusions, in retentivity of the shape of formed particles, in hemolytic resistance and in extracorporeal release property.SOLUTION: The present invention relates to: a biocompatible medical material comprising a biocompatible polymer obtained by polymerizing biocompatible monomers, the biocompatible polymer having a weight average molecular weight of 1000-90000 and comprising a functional group at at least either one molecular end； and to a biocompatible medical material comprising a biocompatible copolymer obtained by binding the biocompatible polymers together.SELECTED DRAWING: None【課題】内包物の徐放性、形成された粒子の形状の保持性、耐溶血性および体外放出性に優れた生体適合性医療用材料を提供する。【解決手段】生体適合性単量体を重合させてなる生体適合性重合体であって、重量平均分子量が１０００～９００００であり、少なくとも一方の分子末端に官能基を有する生体適合性重合体を含有する生体適合性医療用材料、および前記生体適合性重合体同士を結合させてなる生体適合性共重合体を含有する生体適合性医療用材料。【選択図】なし
