Basing on the data of 41 patients who died due to primary carcinoma of the bronchus and all underwent necropsy, the authors note the clinical and paraclinical features of the diseases as follows: 1/ the modes of onset can be ranged in 3 groups: a/ respiratory symptoms (cough, chest pain, etc...): 29/41 (70.7%); b/ General symptoms (anorexia, tiredness, etc.): 9/41 (21.9%); c/ Radiological abnormalities only 3/41 (7.3%). 2/ The physical signs are seen in most patients: 40/41 (97.5%), among them diminished breath sounds are often noted: 27/41 (65.8%) and before pleuritic syndrome: 8/41 (19.5%). 3/ The radiological abnormalities are limited in 6 groups, three of which are the most common appearances: hilar and medicastinum shadows: 10/26(30.4%). 4/ History: adenocarcinoma: 21/41 (51.2%); epidermoid carcinoma: 16/41 (39%); oat cell carcinoma: 4/41 (9.8%).