The aim of this study was to evaluate the outcome of tension-free vaginal tape (TVT) 3 years after surgery. Fifty-one women (mean age 52.9) with a genuine stress incontinence underwent the TVT operation. In 10 patients, a prolapse repair was also done simultaneously. The majority of the patients were operated under local anesthesia. All patients were evaluated 3 years after the procedure using a protocol for objective and subjective assessment of the outcome including an evaluation of quality of life related to urinary incontinence. According to the protocol, 46 women (90%) were successfully cured, another 3 patients (6%) were improved, whereas 2 patients (4%) were classified as failures. Few complications occurred. We conclude that TVT is a simple and well-accepted minimal invasive surgery for treatment of female urinary stress incontinence. The outcome 3 years after the operation showed no signs of deterioration compared to the results shortly after surgery. The cure rate of 90% is comparable with the best results of other surgical treatments for female urinary incontinence.