The aim of the study was to study the course and clinical manifestations of chronic gastroduodenal pathology (CGDP) in schoolchildren.Materials and methods. Clinically examined 286 children and adolescents from 6 to 15 years old with СGDP. The research methods included collection of anamnestic data, instrumental and functional (esophagogastroduodenoscopy, pH-metry), clinical and laboratory (general blood analysis, coprology), and Helicobacter pylori infection was tested by respiratory test and fecal immunochromatographic test.Result. Studies have shown that the main clinical manifestations of СGDP in children were dyspeptic syndrome, vegetovascular dysfunction, and pain syndrome, against the background of objectively visible signs of anemia. Symptoms were more characteristic in patients with СGDP from vegetovascular dysfunction: loss of appetite (83.6%), fatigue (83.2%), recurrent headaches (62.2%), and sleep disturbances (59.1%). Among dyspeptic disorders, unstable stools (85%), periodic nausea (57.7%), belching (56.6%), and a feeling of heaviness in the epigastric region after eating (56.3%) prevailed. Clinical symptoms more pronounced in children with chronic gastritis.Conclusion. For schoolchildren with CGDP, vegetovascular dysfunction (98.9%) with severe dyspeptic disorders (100%) and pain (79%), against the background of objective signs of anemia (53%), is more characteristic. In adolescents is more often a less symptomatic.