In the context of the "WHP- District Network Project", 6 group-treatments for smoking cessation have been performed in five companies, with the voluntary participation of 88 smokers. Health professionals, with specific training, conducted the groups according to specific guidelines. The quitting rate recorded at the end of the course (and confirmed, in two groups, by measurement of exhaled CO) was on average 49% (range 34-70%). The abstainers at one year, recorded by a telephonic follow-up, mounted to 38% (range 29-50%, 4 courses out of 6). The courses have proved to be a good tool to help people to quit smoking and so reducing smoking-associated risks and its synergism with occupational risk factors.