This study investigated the relationship between abdominal obesity and stress urinary incontinence in Korean women. Women aged 30 and over, who visited the Department of Family Medicine of Asan Medical Center were recruited to participate in this study. Anthropometric measurements including body mass index (BMI) and waist circumference were taken, and associated factors of stress urinary incontinence was assessed by questionnaire. Stress urinary incontinence was significantly associated with physical work, vaginal delivery, and high waist circumference. In comparison with women in the lowest quartile of waist circumference, the odds ratios (OR) for stress urinary incontinence in women in the second, third, and fourth quartiles were increased significantly (1.79, 95% CI 1.07-2.98; 3.50, 95% CI 2.02-6.07; and 6.07, 95% CI 3.23-11.40, respectively). Our results indicate that high waist circumference may be a risk factor associated with stress urinary incontinence in women.