Chronic obstructive pulmonary disease (COPD) is a frequent disease, mainly linked to tobacco smoking leading to chronic respiratory failure. It is characterized by an inflammatory spate with modification of protease-antiprotease and oxidant-antioxydant balances. Local modifications are associated with systemic changes. Many occupational factors have been associated with an excess of COPD in epidemiological studies, however without identification of any specific clinical or biological phenotype.