A wrist replacement prosthesis (10) includes a radial brace member (12) to be secured to the radius bone (22), an ulna brace member (16) to be secured to the ulna bone (24), and an articular member (28) to be secured to the carpal bones.Linvention concerne une prothèse de remplacement dun poignet comportant un élément de support radial à attacher au radius, un élément de support cubital à attacher à lulna et un élément articulaire à attacher aux os carpiens.