PROBLEM TO BE SOLVED: To provide a bone holding tool capable of reinforcing the junction of a plurality of bone-fractured portions, and an osteosynthesis reinforcement tool having the bone holding tool.SOLUTION: A bone holding tool 5 connected to a body reinforcing tool 2 for reinforcing the joint of a fractured bone, for holding said bone is characterized by comprising: an annular connection part 31 connected to said body reinforcing tool 2 a support part 32 extended stationarily from said connection part 31 over the region of the direction of the axis A of said connection part 31 and a holding part 33 disposed rotatably relative to said support part 32 for holding said bone.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】骨折した複数部位の接合を容易に補強することができる骨保持具及びこれを備える骨接合補強具を提供すること。【解決手段】骨折した骨の接合を補強する本体補強具2に連結されて、前記骨を保持する骨保持具5であって、前記本体補強具2に連結される環状の連結部31と、前記連結部31から該連結部31の軸線A方向の領域にわたって固定的に延ばされた支持部32と、前記支持部32に対して回転可能に設けられて前記骨を保持する保持部33とを備えることを特徴とする。【選択図】図1