This study guide based on theoretical knowledge illuminates the disease of the bronchial asthma, differential diagnosis, etiology, pathogenesis, classification, clinical picture, teaches to correctly interpret the general and biochemical parameters of blood, as well as instrumental studies, gives an idea of the morphological criteria for the diagnosis and treatment of diseases of the respiratory system. This manual is integrated with other fundamental sciences, such as anatomy, physiology, clinical pharmacology and it is intended for students of 3-4-5-6 courses of the medical and medical-pedagogical faculties of the medical university, general practitioners, pulmonologists, therapists as well as clinical residents and masters.