OBJECTIVE The purpose of this study was to compare the 1-year results of patients on whom we used the transobturator tape method for the stress incontinence treatment according to body mass index (BMI). MATERIAL AND METHODS Patients diagnosed with stress incontinence and treated with the transobturator tape method were divided into three groups according to BMI. We recorded the results of preoperative urodynamic studies; durations of operation, catheterization, and hospitalization; and complications of patients. Patients were evaluated 1 year after the operation with respect to the objective/subjective success rates of the operation, patient satisfaction rates, and possible late complications. RESULTS The obese group was observed to have a significantly higher duration of operation than the normal and overweight groups (p<0.001). The objective and subjective success rates were not significantly different between the groups (p=0.567 and p=0.245, respectively). There was no statistical difference between the groups with respect to the satisfaction rates (p=0.245). There was no significant difference between all three groups with respect to both preoperative and postoperative complication rates (p=0.096). CONCLUSION The transobturator tape method for stress incontinence treatment has similar objective and subjective success rates, independent of BMI. In the obese patients, the operation time is longer than the others, but there is no difference with respect to the complication rates.