Upper gastrointestinal bleeding is a primary and emergency complication of peptic ulcer. Injection of Histoacryl (N-butyl-2-cyanoacrylate) is an effective endoscopic hemostasis procedure to treat peptic ulcer bleeding. However, Histoacryl injection is not a widely used method because of its various and sometimes severe complications. Therefore, the use of Histocaryl should be considered as a second line treatment modality to achieve therapeutic endoscopic hemostasis when the conventional treatment modalities fail or the patient has a high risk of needing operative therapy. Three patients, who had gastric ulcer bleeding from an exposed blood vessel, were each treated by an injection of Histoacryl diluted with Lipiodol at a dilution ratio of 1:1. All 3 procedures were successfully accomplished without any complications.