Chronic respiratory diseases which embrace asthma and chronic obstructive pulmonary disease (COPD) are common in the population. In a large number of cases they are diagnosed very late. Statistics of deaths, especially in the case of COPD, are underestimated because morbidity and mortality can be affected by other comorbid conditions, for example cardiovascular disease. Asthma and COPD impair not only physical functioning of patients but also affect their psychological state. Mood disorders and cognitive function impairment are more often observed in this group than in the general population. It has been proven that the coexistence of psychological dysfunction significantly worsens the functioning of patients (affects, among others, their work, family and social lives) and has an impact on the course of the treatment of the somatic illness. First of all, patients with cognitive deficits have greater problems in applying treatment recommendations. Accordingly, it seems to be important to pay more attention to the problem of mental disorders in patients with obstructive lung diseases. There is a clear need for a multidisciplinary approach that will enable prevention, early detection and effective treatment of the psychological disorders in that group of patients.