Purpose: The purpose of this study was to identify the effects of a smoking cessation program on the amount of smoking and nicotine dependence and the self-efficacy of smoking cessation for smoking workers. Methods: The total number of subjects was 38 smokers and was divided into two: 16 smokers were placed in the experimental group and 22 in the control group. A nonequivalent control group pretest-posttest design was used. The smoking cessation program consisted of two sessions and was implemented for two hours daily for five days. Data was analyzed by using the SPSS/WIN 11.0 program with $X^2-test$, t-test or Mann-Whitney U and ANCOVA. Results: After the treatment, those belonging to the experimental group showed a significantly decreased amount of smoking, a decreased nicotine dependency and increased self-efficacy compared to the control group. Conclusion: The smoking cessation program was effective for diminishing the amount of smoking, decreasing nicotine dependence and improving self-efficacy. Therefore, this program is recommended as a smoking cessation strategy for adult smokers.