Smokers usually become addicted before they reach the age of 18, therefore one of the most important steps to reducing smoking in the whole population must be the development of an efficient strategy for preventing the smoking among the youth. The aim of this research was to examine some smoking habits among high school students, to determine the difference in optimistic bias among smokers and non-smokers and to examine the correlation between life satisfaction and smoking. With the survey on personal information that, as a goal, had the assessment of age, gender, grade in high school, smoking addiction, and to test some habits of smoking, the participants (N=156) also filled out the Scale of life satisfaction and the Adapted measurement of the optimistic bias. About 41% of high school students have declared themselves as smokers, and the largest number of them have started smoking between 11 and 14 years. It is shown that 61% of young smokers hasn't been stopped in buying cigarettes because of their age, while 95,31% said that they smoke up to 20 cigarettes daily. Approximately 51,56% smokers has tried to stop smoking. Most of them (82,05%) prefer smoking to be forbidden in closed public places. Furthermore, 56,41% parents smoke and 78,8% of them doesn't get out when they want to smoke at home. The results of this research showed that smokers have a significantly greater optimistic bias on the items that refer to the aspect of death, while there was no difference between smokers and non-smokers on the perception of addiction. It can be assumed that optimistic bias is more important in the context of more negative threats for the individual. The relationship between life satisfaction and smoking addiction was not found. Possible reason can be found in dinamic of peer groups that are important in this developmental period. Additional analysis has shown that high school smokers also have more friends who are smokers themselves, while non-smokers have quite more friends who do not smoke.