The article analyses experience in treatment of 297 patients with gastroduodenal bleeding of ulcerous etiology. Operative interventions after arrest of bleeding and the appropriate preoperative management produce better results (the mortality rate, 3.3%) than those of emergency operations (the mortality rate, 15.7%). It is therefore advisable to start treatment of patients with gastroduodenal bleeding by means of nonoperative measures which proved effective in 61.6% of cases. In doubtful reliability of hemostasis, patients with moderate and severe bleeding should be operated on in the immediate days after hospitalization without waiting for a possible recurrent bleeding. Gastric resection is the main type of operative intervention in bleeding from a gastric ulcer. In a bleeding duodenal ulcer both resection of the stomach and economical operations--vagotomy, excision or closure of the ulcer, pyloroplasty--are equally competent.