Survey among the workers of a general hospital to investigate how may of them smoke by means of a closed questionnaire given to 1092 Subjects. Smoking habit was positive in 678 (62.1%) and negative in 414 (37.9%); statistical difference was significant p 0.01. The rate for nocturnal workers was 80.0 in comparison with those of the morning and evening with 55.81 and 62.38 respectively. Men smokers had 66.79 of rate and women 57.55 with no statistical difference. Cigarette was the most common form of tobacco consumption, pipe and cigars were very rate. The most important number of smokers were 31-40 (65.4% and 21-30 (62.7%) years old, very few under 21 but among these 63% were smokers. Smoking habit was more common in the groups of high schooling [correction of scolarity]. Physicians were an important group of smokers, 61.6 per cent of 284 use to smoke while working in the hospital. Other characteristics of smokers are discussed and it is concluded that is necessary to take action to get a tobacco free hospital.