Abstract: An elastic hinge (40), in particular for spectacle frames, has first and second hinge elements (50, 60) rotatably mounted around a pivot (45), a cam profile (53) integral with the first hinge element, a bearing piece (65) movably mounted in the second hinge element along an elastic translation axis. The bearing piece has a first contact area co-operating with the cam profile to give the hinge at least one stable position, and provides a lock for the hinge when a position of excessive opening is reached. The lock includes a protrusion (53-4) of the cam profile arranged for co-operating with a second contact area (65-2) of the bearing piece by exerting, essentially on the bearing piece, a force substantially perpendicular to the translation axis thereof.