The authors report their experience of 11 cases of hemoperitoneum due to hemorrhagic endoabdominal neoformation, diagnosed through laparoscopy, and the diagnosis of which was confirmed by the biopsy under the sight. They describe the casuistry observed: 4 hepatic neoplasms (11,9%); 4 ovary neoplasmus (12,1%); 1 neuroblastoma (10%); 2 ovary endometriosic cysts (16,6%). They, at last, emphasize the usefulness of laparoscopy as an investigating mean offering a sure diagnostical reliability.