Supervisions of duodenal ulcers complicated with a bleeding are shown, on the basis of Vladivostok city hospital No. 2 in 2005-2007 (107 cases). The efficiency of the endoscopic hemostasis is shown, allowed to fix the bleeding in 92% of cases. It is judged, that endoscopic hemostasis are indicated in ulcer bleedings of 1st and 2nd groups on Forrest classification, but can be inefficient at a proceeding bleeding. The most productive is the combination of the different methods of the endoscopic hemostasis (infiltration, coagulation, denaturation).