The aim of the study was to examine Polish students' smoking behavior. A group of 671 students completed a questionnaire about smoking. 53.1% of them tried smoking at least once. The most common age at an attempt to smoke was 18 years. Males tried smoking earlier than females. 23.1% were active smokers during the study. The age of 18 was the most common time when smoking became regular. Males smoked more frequently than females. There were significant differences between the kind of school and the frequency of smoking. Students of smoking parents smoked more frequently than those of non-smoking ones. Most smokers (80%) were aware of detrimental effects of addict and declared a will to quit smoking. We conclude that a substantial percentage of Polish students smoke. Anti-tobacco prevention must be started early, before the age of 18 and continued up to 21.