This study was done to determine the factors influencing smoking-cessation behavior in female university students. a total of 534 students participated in this cross sectional study by answering a questionnaire. The data collection was done between September 1 and October 31, 1997. The measurement tools used in this study were the self help change process scale(Cronbach's alpha=.9930 : developed by Oh&Kim, 1996) for smoking-cessation behaviors, the self efficacy scale(Cronbach's alpha=.8250 : developed by Sherer et al, 1982), the sex role acceptance scale(KR-20=.7757 : developed by Kim, 1991) and the social support scale(Cronbach's alpha=.9172 : developed by Park, 1985). The summarized results are follows : 1. The mean scores for smoking-cessation behaviors in smokers(N=150) was 91.72 that was considered a middle score compared to the total possible score of measurement tool(150.0). The mean score for smoking-cessation behaviors by smoking-cessation step showed significant different between the groups(F=11.71, p= .000). 2. The group with no experience in smoking(N=332) showed a high general self efficacy score(t=5.24, p= .000), and more openness to sex role acceptance(t=-2.15, p= .032) compared to the group with smoking experience(N=202). 3. General self efficacy, sex role acceptance, and social support were not different significantly between the groups according to the steps in smoking-cessation. 4. Significant factors influencing smoking-cessation behavior(total, sub concepts) were religion, sex role acceptance, social support, smoking duration, smoking attitude, time of smoking onset, amount of smoking, drinking, and perception of health status. 5. Smoking-cessation behaviors which explained 11% of the variance were smoking attitude, and smoking duration. In conclusion, this study identified factors influencing smoking-cessation behavior. Thereby it will help in the development of smoking-cessation ration other determinants of smoking cessation behaviors, evaluation of intervention efficiency, and comparative study by gender characteristics are needed.