Arteriovenous malformations of the gastrointestinal tract are a known but rare cause of bleeding. Those of the stomach are the rarest if compared with other causes of gastric bleeding. The aetiology is still unknown, but senile age is considered an important cause, as are the degenerative processes connected with old age. These lesions are diagnosed by endoscopy which, with a haematostatic intent, often is not sufficient to stop the bleeding. Angiography is necessary for patients with massive bleeding whose endoscopy results are negative. The surgical treatment of gastric arteriovenous malformations requires excision of the lesion and part or all of the stomach. We report the case of a 57-year-old patient admitted to the Casualty Department with haematemesis and anaemia caused by acute gastric bleeding.