Examining the gastroduodenal mucosa (GDM) in 61 patients with chronic obstructive pulmonary diseases (COPD) showed changes in the areas studied in all cases. GDM atrophy increased with the severity of COPD. Helicobacter pylori are essential in developing gastric pathology in patients with mild bronchopulmonary disease. The severity of atrophic gastritis increases with the longer duration of COPD and with more severity of hypoxia and bronchial obstruction.