A realistic endoscopic trainer to simulate gastroscopy training. It enables examination of the upper gastrointestinal tract and improvement of diagnostic skills in the area of esophagus, stomach and duodenum diseases. It has patented lips that allow direct access to the esophagus and stomach to the level of the duodenum for the passage of endoscopes and other training devices. The stomach is made in great detail with an indication of the pylorus and gastric folds.