PURPOSE: To assess the clinical characteristics in patients with premature ejaculation. MATERIALS AND METHODS: A total of 48 patients with premature ejaculation (mean age: 42.7 years) completed questionnaire which is a 19-item scale assessing anxiety for rapid ejaculation, ejaculatory latency during vaginal and oral intercourse and masturbation, patient and spouse's satisfaction for ejaculatory latency, and orgasm of patient and spouse. RESULTS: The average frequency of sexual intercourse was 1.8 per week, which was similar to that of the age-matched normal adults. Anxiety for rapid ejaculation was noted in 79.2% of the patients. Most (91.7%) of the patients ejaculated within 1-2 minutes during vaginal intercourse. Premature ejaculation during oral intercourse and masturbation was noted in 77.8% and 77.8%, respectively. Ejaculatory latency during masturbation was significantly delayed compared to that during vaginal intercourse (p<0.05). Dissatisfaction for ejaculatory latency was noted in all of the patients and in 81.2% of their spouses. Frequency of having orgasm was decreased in spouses (never having in 27.1%, almost having in 4.2%, often having in 6.2%). The patients' attempts to delay ejaculatory latency were as follows; drinking alcohol (47.8%), having another idea during intercourse (39.6%), utilizing condom (29.2%) and intercourse frequently (20.8%). CONCLUSIONS: These data may be helpful in establishing the clinical charateristics of the patients with premature ejaculation and formulation appropriate treatment plans.