Background: The aim of the study was to list different mucosal lesions in the established acute form of pancreatitis in the upper part gastrointestinal tract in endoscopy. Methods: We performed a prospective study in patients over 18 years of age with acute pancreatitis. Abdominal pain with sudden onset or serum amylase and/or lipase > 2 times upper limit of normal. characteristic of acute pancreatitis in Abdominal computed tomography (CT) or typical findings of acute pancreatitis in Ultrasound scan. Patients who are unfit or not willing to undergo endoscopy or who have a peptic ulcer disease detected during endoscopy, peptic ulcer disease in the last 3 months is excluded. Results: In this study, the most common age group for acute pancreatitis was 30-60 years. In this study, alcohol is the most common cause of acute pancreatitis, accounting for 90% of the study. Abdominal pain is the most common symptom. CT scan is most (100%) confirmatory in the diagnostic study of acute pancreatitis. This study involved 30 patients with acute pancreatitis. In OGD, 24(80%) patients had a positive finding in the upper gastrointestinal tract, in that 16 patients(53.33%) significant Gastritis found. An enlarged pancreas is the only CT finding in most cases. Conclusions: Esophagitis and duodenal and gastric ulcer are common endoscopic findings in acute pancreatitis. They do not correlate with the severity of pancreatitis.