Urinary incontinence is a common side effect of treatment of gynecological cancers and has an important negative effect on the patients’ quality of life. It can be caused by all of the three main treatment methods in gynecological oncology, namely by surgical procedures, radiation and chemotherapy. Urinary incontinence can result from the treatment of all kinds of gynecological cancers; its incidence primarily depends on the form of treatment. The basic principle of treatment of urinary incontinence is removal of its causes, which can be done by several conservative or operative methods. After treatment of gynecological cancers, doctors should be aware of the possibility of urinary incontinence and should actively ask the patients about this kind of symptoms. Early diagnosis and correct treatment of urinary incontinence can significantly improve the quality of life in gynecological oncological patients.