Analysis was made of 893 patients operated for duodenal ulcer. Of these, 872 (97.6 per cent) were operated as nonemergency planned patients; the outcome was fatal in 5 (0.57 per cent). Emergency operative intervention at the acme of the bleeding was performed in 21 patients (2.4 per cent) because of failure to control the bleeding by conservative means. Six of these patients died (24.0 per cent) during the early postoperative period. Highest was the percentage of patients in whom extended gastric resection was made; there were no lethal cases among patients subjected to antrumectomy and truncus resection. Preference is given to truncus vagotomy with sparing resection of the stomach; this is considered a reliable and safe method for stopping the bleeding and curing the patients from the ulcer.