The modern lung hospital offers favorable conditions for the rehabilitation of patients suffering from chronic obstructive pulmonary diseases. In the years from 1972 to 1976 2398 patients suffering from chronic bronchitis, bronchial asthma and pulmonary emphysema were subjected to a rehabilitation process at the central hospital for heart and lung diseases Bad Berka. A long-term therapy plan based on a most accurate investigation possible of all the factors which trigger off the complaint in each case was used as baseline. An account is given of the resulting diagnostic and therapeutic program carried out. In the case of chronic obstructive pulmonary diseases it is particularly difficult to assess the effectiveness of rehabilitation measures. One aspect dealt with is the restoration of working capacity. 56.7% of the men and 56.8% of the women were capable of working when they were dismissed. 31.6% of male and 26.4% of female patients were invalids, 11.7% and 16.8% respectively were old age pensioners. Rehabilitation success depended on variables such as age, degree of cardio-pulmonary limitation in performance, as well as on certain concomitant diseases and the patient's cooperation. A decisive factor in some cases was also whether suitable employment could be found for these patients whose age ranges between 40 and 60.