The invention relates to a structure for the treatment of pectus carinatum and pectus excavatum, comprising front transverse rod segments (1, 1'), rear transverse rod segments (2, 2') and side rods (3, 3'), at the rear ends of which pins (4, 4') are provided which fit into holes in the front edges of the outer ends of said rear rods and which are retained therein by screws (5, 5') which extend in the transverse direction, near the front edges of the outer ends of the rear rods, and on which protection caps (6, 6') are provided. Also provided are spindles (7, 7') which extend through openings (8, 8') located in the outer ends of said front transverse rods and provided with screw threads on the front ends of the side rods, by means of knobs (9, 9') for adjusting the compressor in the transverse direction, the inner ends of the front and rear transverse rods fitting into rails (10, 10') to which front pressure pads (12, 12') and rear pressure pads (13, 13') are fastened by screws (11, 11'), the latero-lateral adjustment of the compressor being achieved by adjusting the position of elongated slots (14, 14') at the inner ends of the front and rear transverse rods, relative to said fastening screws.Cet agencement, pour le traitement du pectus carinatum et du pectus excavatum, est formé par une structure constituée par des segments de tiges transversales antérieures (1, 1') et postérieures (2, 2'), et par des tiges latérales (3, 3'), dont les extrémités arrière présentent des chevilles (4, 4') qui viennent s'emboîter dans des trous prévus dans les bords avant des extrémités externes desdites tiges postérieures, et qui sont retenues au moyen de vis (5, 5') disposées transversalement au voisinage des bords avant des extrémités externes des tiges postérieures, et où sont prévus des éléments de protection (6, 6'), avec en outre des broches (7, 7') qui traversent des anneaux (8, 8') prévus au niveau des extrémités externes desdites tiges transversales antérieures, lesquelles br