PROBLEM TO BE SOLVED: To provide a zirconium alloy for biological use which has a low elastic modulus and a bone fixator which causes less stress shielding.SOLUTION: There are provided: a zirconium alloy for biological use, which is mainly composed of Zr and contains Nb in a range from 15 to 25 mass% and a bone fixator made of the zirconium alloy.COPYRIGHT: (C)2012,JPO&INPIT【課題】弾性率が低い生体用ジルコニウム合金、及び、ストレスシールディングが発生しにくい骨固定具を提供する。【解決手段】Zrを主成分とし、Nbを15質量%超25質量%以下の範囲で含む生体用ジルコニウム合金、及び該ジルコニウム合金からなる骨固定具である。【選択図】なし