PROBLEM TO BE SOLVED: To adjust the degree of flexural deformation of a rear column of a short leg brace so that a wearer can carry a foot well. SOLUTION: This is a rear strut 4 of a short leg orthosis 1, which is provided between a rear part of the heel of a foot rest part 2 on which a foot part is placed and a lower leg attachment part 3 which is attached to a lower leg part below a knee part. A plurality of FRP sheets 5a to 5c are laminated on the rear support 4, and the upper end portion and the lower end portion of the FRP sheets are joined by heat fusion. The upper end portion 4A is a portion that is coupled to the lower leg mounting portion 3, and the lower end portion 4B is a portion that is coupled to the footrest portion 2. An intermediate portion between the upper end portion 4A and the lower end portion 4B has gaps S1 and S2 between the FRP sheets 5a to 5c. [Selection diagram] Figure 1【課題】 短下肢装具の後方支柱の撓み変形の程度を調整可能とし、装着者が足の運びをうまくできるようにする。【解決手段】 足部を載せる足載せ部２の踵後方部位と、膝部下方の下腿部分に装着される下腿装着部３との間に設けられる、短下肢装具１の後方支柱４である。後方支柱４は、複数のＦＲＰシート５ａ～５ｃが積層され、ＦＲＰシートの上端部および下端部が熱融着により接合されている。上端部４Ａが下腿装着部３に，下端部４Ｂが足載せ部２にそれぞれ結合される部分である。上端部４Ａおよび下端部４Ｂの間の中間部分は、ＦＲＰシート５ａ～５ｃの間に隙間Ｓ１，Ｓ２を有する。【選択図】図１
