Clinical and endoscopic results of a study at 94 patients with gastroesophageal reflux disease (GERD) and obesity, as well as 85 patients with GERD are presented. A high incidence of atypical clinical manifestations of GERD on the background of obesity (an extraesophageal form of the disease) was revealed. An endoscopic study has mainly established reflux esophagitis of grades B and C (LA) in patients with obesity and a high percentage of cases (up to 59.5%) of duodenogastric reflux with a combination of GERD and obesity, especially in patients with atypical clinical form of reflux disease.