PURPOSE: This study was to investigate the smoking related social influence, refusal skill and nonsmoking related self-efficacy among adolescents. METHOD: The subject for this study consisted of 3,000 students of middle and high school located in Chonbuk province. The data were collected by self-report questionnaire from Aguest 19 to September 14, 2002. RESULT: The smoking rate was 3.3% in middle school students and 13.6% in high school students. The subject have had 61.1% of family members, 42.7% of same sex friends, 39.4% of object sex friend, 64.9% of peer group and 85.9% of teachers were being smoke. The smoking related social influence and smoking status showed significant relationship; current smokers' smoking related social influence level was much higher than former and never smoker. Friends', teachers' and family members' influences were important to adolescents' smoking. Adolescents had social influence made by many smokers. 27.7% of subject were suggested to smoke by near people, 40.4% of which them were smoked or tried to smoke. The mean refusal skill score of subject was 39.13 points per hundred. Adolescents have showed very low level of refusal skill to smoke. Current smokers' refusal skill level was significantly lower than former and never smoker. The mean average nonsmoking related self-efficacy score of current smoker was 44.46 percents per hundred, it showed that current smoker had very low level of self-efficacy to ceasing smoke. CONCLUSION: For the purpose of adolescents smoking prevention and ceasing, the educational program must designed to reduce smoking related social influence, to promote the refusal skill and nonsmoking related self-efficacy.