[Problem]To provide a medical polymer material that fully satisfies the following: 1) presenting excellent tissue compatibility； 2) presenting a bone-bonding property； 3) presenting a Young's modulus close to that of bone； 4) having excellent mechanical properties； 5) being non-allergenic； 6) being a nonmagnetic material； and 7) being not brittle.[Solution]A medical polymer material in which a phosphate group having a C-O-P chemical bond including elemental C in a main chain of a structural formula is present on a surface of a polymer material substantially free of phosphate and hydroxy groups except for ends in the structural formula.
