A bistable hinge element for an eyeglasses frame, which includes a temple cage having a bottom extended laterally by two longitudinal side walls which define a housing that opens onto the proximal transverse face through an opening that is U-shaped in cross-section. The hinge element further includes a front cage which has a bottom extended laterally by two longitudinal side walls which define a housing that opens onto the proximal transverse face through an opening that is U-shaped in cross-section, and a solid body that is elastically deformable along the longitudinal axis, and which has a central portion, with a cross-section corresponding to the transverse cross-section of the U-shaped openings, which is extended at each end by a bulge of a cross-section that is complementary to the transverse cross-section of the housings of the temple and front cages.