Smoking causes significant health and economic consequences. The control of workers' smoking habit is a crucial point of health promotion in the workplace. Tobacco smoke can interact with other chemical hazards in the workplace increasing the risk for the development of lung cancer and Chronic Obstructive Pulmonary Disease (COPD). Workers' smoking habit has significant social determinants. Blue-collar workers present higher smoking prevalence and they are heavier smokers than white collar ones. Also blue-collar workers have higher rates of exposure to Environmental Tobacco Smoke (ETS). Some studies have shown that smoking restrictions and bans have a positive influence on the control of workers' smoking habit. However an effective antismoking campaign must not be partial but on the contrary integrated into a broader context of occupational health promotion and safety in the workplace. Pneumon 2005, 18(1):46-52.