Endometriosis is one of the most frequent gynecological diseases. In its development take a part genetical, mechanical and immunological factors. Main symptoms are cycle-dependent pelvic pain, infertility and characteristic morphological alterations ("pelvic mass"). For the diagnosis the laparoscopy plays the leading role. Therapy is based either on the hormonal inhibition of ovarian function (danazol, GnRH agonists), or surgical interventions (operative laparoscopy), as well as the combination of both methods.