The present invention concerns an ankle ergometer (100) for measuring a force exerted on the ankle joint (C) of a user (U) by the muscles involved in the mobility of said ankle (C), said ergometer (100) comprising: - a first splint part (10) capable of receiving said lower member when the knee of said user (U) is extended, and comprising immobilisation means (11) configured to immobilise said lower member with the leg (J) extended, and - a second part (20) comprising: a) a main body (21) fixed to the first part (10), b) a counter-bearing element (22) rigidly connected to said main body (21), c) a rigid plate (23) forming a bearing surface for the lower surface of said foot, said rigid plate (23) being substantially static relative to said counter-bearing element (22), d) a force sensor (24) interposed between said plate (23) and said counter-bearing element (22), said plate (23) not being rigidly connected to said main body (21), in such a way that said sensor (24) is capable of measuring the force exerted on the bearing surface of the plate (23) by the muscles involved in the mobility of said ankle (C), said force being transmitted from the plate (23) to the counter-bearing element (22).La présente invention concerne un ergomètre (100) de type cheville pour mesurer une force exercée sur larticulation de la cheville (C) dun utilisateur (U) par les muscles intervenant dans la mobilité de ladite cheville (C), ledit ergomètre (100) comportant : - une première partie (10) de type attelle apte à recevoir ledit membre inférieur lorsque le genou dudit utilisateur (U) est en extension, et comprenant des moyens dimmobilisation (11) configurés pour immobiliser ledit membre inférieur avec la jambe (J) en extension, et - une deuxième partie (20) comprenant : a) un corps principal (21) fixé à la première partie (10), b) un élément de contre-appui (22) solidaire dudit corps principal (21), c) une plaque rigide (23) formant une surface dappui pour la surface inférieure dudit pied,
