Chronic obstructive pulmonary disease (COPD) is a chronic debilitating, organic disease that might cause frequently some psychiatric disturbances, especially depression and anxiety. Because of the variety of scales used to measure these symptoms, their prevalence varies considerably. Regardless of whether anxiety and depression are considered separately or as a single construct, their impact on COPD patients is important. The experience of dyspnea may be a contributing factor to anxiety and depression and these may also cause the deterioration of the COPD.