The consumption of tobacco is a major public health problem growing rapidly around the world. The main goal of this study is to determine the prevalence of tobacco consumption, evaluate the degree of dependence to nicotine and measure the intentions of quitting smoking in a scholar environment of teenagers. In this work, a transversal investigation was made from Mars to June 2013, among a sample of 1236 middle and high school students by the mean of a survey employing two measures of tobacco dependance (test of Fagerström and test of Hooked On Nicotine Check-list : HONC). The results showed that tobacco consumption in the moment of the study was reported by 18.1% of the surveyed subjects. The test of Fagerström noted that 51.7% of smokers have a strong dependence, the prevalence of the medium and low dependence achieved 20.4% and 25.9% respectively. According to the HONC test, 64.7% of smoking students have lost control over the consumption of tobacco. This study shows the risks of tobacco consumption adopted by high and middle school students and suggests to promote preventive and therapeutic actions.