The invention concerns an ultra-light orthosis comprising a sleeve (14) made from a woven elastic fabric, shaped to exert retention forces on either side of a member and on a joint, and a plate (11) fixed on an inner face of the sleeve to come into direct contact with the skin over the joint, the plate (11) comprising a layer made from an elastic fabric (11d) to which a layer of polymer gel (11e) is adhered, an annular portion (11a) shaped to surround the top of a protruding area of the joint, and a tab (11b) extending from an outer edge of the annular portion, in an axial direction of the sleeve, the plate adhering to the skin such that, under the effect of the retention forces exerted by the sleeve, when the sleeve is stretched longitudinally, it remains stretched and applies tensile forces locally to the skin in a direction parallel to the surface of the skin, towards the centre of the annular potion and the joint.
