PROBLEM TO BE SOLVED: To provide a short lower-extremity orthosis capable of plantarflexing or dorsiflexing a lower-thigh part with excellent sideways stability and allowing a user to appropriately walk by freely adjusting the angle of dorsiflexion of the lower thigh part.SOLUTION: The lower-thigh part 3 is pivotally attached to an ankle region 4 of a foot sole part 1 in such a way as plantarly and dorsally flexible, and a stopper 6 of a required height is erected on a heel region 2 of the foot sole part 1 to stop the lower-thigh part 3 at a prescribed dorsiflexion angle. A slit 7 of a required width is notched from the upper end toward the lower end of the stopper 6 in such a way as can be reamed, and a reaming angle adjusting member 9 with elasticity is disposed in the slit 7 freely movably in the vertical direction. The short lower-extremity orthotic is configured to adjust the dorsiflexion angle of the lower-thigh part 3 by adjusting the flexibility in reaming of the slit 7 while appropriately moving the reaming angle adjusting member 9 in the vertical direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】本発明は、下腿部を側方安定性よく底背屈作動せしめると共に、下腿部の背屈角度を自由に調節せしめて適正に歩行せしめることが出来る、短下肢装具を提供するものである。【解決手段】足底部1の踝部位4に下腿部3が底背屈自在に枢着され、該下腿部3を所定の背屈角度に停止せしめるべく足底部1の踵部位2上に所要高のストッパ-6が起立状に形成され、該ストッパ-6にはその上端部から下端方向に向けて所要幅のスリット7が拡開自在に切欠き形成されると共に、該スリット7間には弾性を有する拡開度調節部材9が上下動自在に配設されてなり、上記拡開度調節部材9を適宜上下動せしめつつスリット7の拡開自由度を調節して下腿部3の背屈角度を調節せしめるべく構成されている。【選択図】図2