PROBLEM TO BE SOLVED: To provide an ankle orthotic having a stable walking supporting function, allowing a user to easily wear and use and especially to use by one hand, and capable of being fitted and firmly fixed to the ankle.SOLUTION: The ankle orthotic includes: a cylindrical member 1 for covering at least the ankle two crossing belts 2a and 2b extending from a sole part 7 or side part of the cylindrical member in the horizontal direction and crossing each other from an instep part 9 to a lower-leg front part 10 to be wound and fixed to the lower leg and an insertion means (e.g. a slit 11) for gathering the belts so that the belts are adjacently held in the crossing region of the belts.COPYRIGHT: (C)2010,JPO&INPIT【課題】装着が簡単で扱い易く、特に、片手で操作可能で、然も足関節にフィットしてしっかりと固定でき、かつ安定した歩行支援機能を有する足関節装具を提供する。【解決手段】足関節装具は、少なくとも足関節を被覆する筒状部材1と、前記筒状部材の足底部7または側部から左右に延び、足甲部9上から下腿前部10上で交差して下腿部分に巻き付け固定し得る2本のクロスベルト2a,2bと、前記ベルトの前記交差部分において前記ベルトが隣接して保持されるよう、前記ベルトを纏める挿通手段(例えば、スリット11)とを備えるものとする。【選択図】図1(a)