The aim is to study the effect of Helicobacter pylori infection on risk of developing gastroesophageal reflux disease. Materials and methods - cross-sectional observational study of 1007 patients with dyspepsia syndrome who underwent videoesophagogastroduodenoscopy with biopsy and histological examination of biopsy specimens of the gastric mucosa by OLGA-system. The age, gender, overweight, cigarette smoking, presence of Helicobacter pylori infection and gastritis stage were assessed. Results - the study showed a significant decrease in the incidence of gastroesophageal reflux disease in patients with positive H. Pylori status by 4% (RR 0,68; 95% CI, 0.49-0.94, p=0,041). The risk of developing gastroesophageal reflux disease significantly higher in overweight (RR 2,62; 95% CI 2,0-3,56; р<0,001) men (RR 1,76; 95% CI 1,33-2,32; р=0,0046) who smoked cigarettes (RR 3,23; 95% CI 2,45-4,24; р<0,001) and was not associated with the patient’s age and the stage of gastritis (р>0,05). Conclusion - a significant reduction in the frequency and risk of developing gastroesophageal reflux disease in patients with Helicobacter pylori infection is demonstrated.