Four patients with hepatic artery aneurysm are reported. Two patients presented with abdominal pain, initially considered a consequence of pancreatic disease. A third patient had a sudden onset with hemoperitoneum and shock. In the fourth patient the aneurysm burst into the common bile duct causing hemobilia and jaundice. All were successfully treated with hepatic artery ligation, which left the patient free of symptoms during long-term follow-up. Arteriography should facilitate diagnosis and artery ligation appears the best treatment.