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-cess-ation 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 intervention strategies. For future research, exploration other determinants of smoking cessation behaviors, evaluation of intervention efficiency, and comparative study by gender characteristics are needed.