Device for passive mobilization of the ankle

According to the invention, the mobilisation device at least comprises: a base plate ( 2 ), and a tibial support ( 7 ) integral with the base plate ( 2 ) and whose longitudinal axis extends over a sagittal plane (S). A foot support assembly ( 10 ) that is integral with the base plate ( 2 ) being substantially aligned with the tibial support ( 7 ) comprises a cradle ( 20 ) mobile in rotation about an axis (Delta) parallel to the sagittal plane (S), so as to allow user movements of foot abduction and adduction, and a footrest plate ( 21 ) integral with the cradle ( 20 ) and mobile in rotation with respect to the cradle ( 20 ) about an axis (Delta') forming an acute, nonzero angle (alpha) with the rotation axis (Delta) of the cradle ( 20 ), so as to allow user movements of foot inversion and eversion. A motorised driving means ( 15 ) is provided for driving the cradle ( 20 ) in alternate rotation about its axis (Delta), intended to induce at least alternate passive movements of foot adduction and abduction by the device user