The authors demonstrate on the case-history of a 51-year-old patient the rare cause of repeated haemorrhage into the digestive tract calling for emergency surgery. On operation they found as the cause a solitary biliary concrement which penetrated into the duodenum and caused haemorrhage of its wall. The disease was described in 1896 by Bouveret as a syndrome of duodenal obturation by a large gallstone. In the described case the whole concrement did not yet penetrate into the duodenum to cause its obturation but it produced repeated haemorrhage which could not be treated by conservative methods.