PROBLEM TO BE SOLVED: To provide a bone retainer capable of avoiding such a situation in which a bone holding state is lost due to external force.SOLUTION: A bone retainer 10 comprises: a sleeve 11 comprising a shaft hole 11c extending in an axial line direction, comprising a side opening 11e communicated to the shaft hole on a side part on a tip end side, and comprising a base end opening for opening the shaft hole to outside on a base end and a pin 12 comprising a guided part 12a to be guided to an inner face of the shaft hole of the sleeve, and a tip end part 12b which is extended from and retreats to the side opening 11e by drive through the base end opening. The sleeve 11 has a guide surface 11d which is inclined toward an opening edge 11f on a tip end side of the side opening 11e, the pin 12 is configured to be guided to the guide surface 11d when the pin is extended from and retreats, from the side opening 11e. The side opening 11e has an opening shape extending in a linear state in a width direction in view from a direction where a center part of a width direction orthogonal to at least the axial line direction on the opening edge 11f on the tip end side is along the guide surface 11d.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】外力により骨の保持状態が失われることを回避できる骨固定装置を提供する。【解決手段】本発明の骨固定装置10は、軸線方向に延伸する軸穴11cを備え、先端側の側部に軸穴に連通する側部開口11eを備えるとともに基端には軸穴を外部へ開口させる基端開口を備えたスリーブ11と、該スリーブの軸穴の内面に案内される被案内部12a、および、基端開口を介した駆動により側部開口11eから出没動作する先端部12bを備えるピン12と、を具備し、スリーブ11には、側部開口11eの先端側の開口縁11fに向けて傾斜した案内面11dが設けられ、ピン12は、側部開口11eにおいて出没動作する際に案内面11dに案内されるように構成され、側部開口11eは、先端側の開口縁11fにおける少なくとも軸線方向と直交する幅方向の中央部分が案内面(11d)に沿った方向に見たときに幅方向に直線状に伸びる開口形状を有する。【選択図】図1
