Gastroesophageal reflux disease (GERD) is one of the most common publication subjects in gastroenterology field for more than twenty years. The following article is a review of endoscopic methods of treatment of GERD complications. It is interesting that complications of disease are quite common despite the constant development of diagnostics and treatment methods. It is still common to diagnose the disease when the first manifestation is the esophagus constriction. The complication of GERD is the intestinal metaplasia and adenocarcinoma of the distal part of the esophagus. There are effective endoscopic methods of GERD complications treatment. The most effective are esophagus dilations and endoscopic pathological mucosae layer removal like photodynamic therapy, laser ablation, argon coagulation, multipolar coagulation or mucosectomy.