The invention relates to the field of human necessities and can be used in medicine, particularly for treating patients experiencing loss of or impaired locomotive function of the lower extremities. An ankle brace or an ankle exoskeleton comprises a base element and a first lever pivotally mounted on the base element. A first vertical element is hingedly connected by the upper end thereof to the first lever, and a second vertical element is hingedly connected by the upper end thereof to the base element. A support for the sole of the foot is connected by a first side face to the lower end of the first vertical element and by a second side face to the lower end of the second vertical element by means of hinges that have at least two degrees of freedom.