PROBLEM TO BE SOLVED: To provide a foot joint exercise support device which is operated smoothly and can reduce discomfort felt by a user when it is mounted.SOLUTION: A foot joint exercise support device 1 for supporting a dorsiflexion/plantar flexion exercise of a user's foot joint includes: a base part 10 having a thigh holder 15 for fixing the user's thigh； a swing part 30 having a foot holder 35 for fixing the user's foot； a pair of rotation shafts 3A for pivotally supporting the swing part rotatably with respect to the base part on a lateral side of the user's malleolus； a bendable and extensible bellows 80 disposed on the user's calf side, one end of which is connected to the base part, and the other end of which is connected to the swing part； a pipeline 90 communicated with the bellows； and an inner pressure adjusting part 100 for supplying working liquid to the bellows and discharging the working liquid from the bellows through the pipeline, and generating force to support the dorsiflexion/plantar flexion exercise of the foot joint.SELECTED DRAWING: Figure 1【課題】動作がスムーズであると共にユーザの装着違和感を軽減することができる足関節運動支援装置を提供すること。【解決手段】ユーザの足関節の背屈・底屈運動を支援する足関節運動支援装置１であって、ユーザの下腿を固定する下腿ホルダ１５を備える基部１０と、ユーザの足を固定する足ホルダ３５を備える揺動部３０と、基部に対して揺動部を回動可能にユーザの踝の側方で軸支する一対の回動軸３Ａと、ユーザの脹脛側に配置されると共に、基部に一端が連結され他端が揺動部に連結される屈曲及び伸縮自在なベローズ８０と、ベローズと連通する配管９０と、配管を通じて、ベローズへの動作流体の供給、及び、ベローズからの動作流体の排出を行い、足関節の背屈・底屈運動を支援する力を発生させる内圧調整部１００と、を備える。【選択図】図１
