Chronic respiratory system diseases are a serious public health issue all over the world. Chronic obstructive pulmonary disease (COPD) is one of the most frequent pulmonary diseases. Chronic obstructive pulmonary disease limits to a wide extent patients’ everyday functioning in physical, emotional and social aspects. It is the reason for the decrease in patients’ quality of life. Not many reports, especially Polish studies, are concerned with COPD’s influence on emotional and cognitive functioning. The aim of the study is to present the co-morbidity of depression, anxiety disorders and cognitive impairment among patients who suffer from COPD