The book examines the stages of formation and anatomical and physiological features of the digestive tract in children, semiotics in its pathology; presented methods of gastroenterological examination; detailed modern views on the etiology, pathogenesis, clinic, diagnosis and treatment of diseases of the gastrointestinal tract in children; a list of the main drugs used in pediatric gastroenterology with dosages is highlighted. Separate sections are devoted to the basics of pediatric nutrition.