Objectives: Assessment of quality of life in women stress urinary incontinence (USI) and evaluation of tension-free vaginal tape (TVT) treatment. Material and Methods: The research included a group of 112 women aged 33–78 years. Before as well as 3 and 6 months after the TVT operation, patients were asked to fill in quality of life questionnaires. Results: After 3 months 87.25% of the women reported full regression of USI symptoms, 7.8% an insignificant improvement, and 4.9% did not observe any change. After 6 months 85.71% reported full regression, 9.18% an insignificant improvement, and 5.1% did not observe any change. USI is responsible for a decrease in physical activity. The most uncomfortable symptom is involuntary urine leakage occuring mainly during an effort or sleep. After the TVT procedure, the majority of women confirmed a significant improvement in quality of life. Conclusions: The TVT procedure is an effective method of treating USI in women: it significantly improves quality of life, with a recovery rate of 85–87%, and a low rate of complications.