Pseudoanurysm due to chronic pancreatitis is uncommon, but it can cause recurrent and massive hemorrthage. Because of high morbidity and mortality associated with the pseudonaneurysm. early detection and treatment is essential. Surgical ligation or resection of the aneurysm has a high mortality and therefore, transcatheter embolization is preferably carried out. We report a case in which gastroduodenal artery pseudoaneurysm caused by chronic pancreatitis was successfully treated by transcatheter embolization using Gelfoam and Gianturco spring coils.