The device of the sternum prosthetic adaptable comprising a plate (1) and means (2) for attachment to the ribs, where each of the means (2) for attachment to the ribs comprises an end (20) for fixing to the plate (1) and one end (21) provided with means for attachment to one side, while the plate (1) comprises the fixing zones each of a means of attachment (2) which each comprise a threaded hole (30, 40) for tightening a screw (10) passing through the fixing end (20). The plate (1) comprises, arranged on each side of a median longitudinal axis (xx ′), two series (3, 4) of tapped holes (30, 40), where each of the series (3, 4) comprises a number of holes (30, 40) is greater than that of the attachment means (2) to secure together, so as to make it possible to choose the holes (30, 40) the most suitable for the patient's anatomy.
