[영문]Smoking is popular among Korean male high school adolescents, with the prevalence of 20.7% differing markedly with the type of school, being 16.3% and 27.6% in academic and vocational technical high schools, respectively. The purpose of this study was to identify significant variables that predict stages of smoking cessation among Korean high school students using the transtheoretical model (TTM), in order to provide an empirical basis for developing smoking cessation programs.