Objective It was aimed to evaluate long‐term radiological changes in severe coronavirus disease 2019 (COVID‐19) patients, to investigate pulmonary function, exercise capacities, and health‐related quality of life results. Methods Sixty‐five patients with severe COVID‐19 pneumonia were evaluated in the sixth month after discharge from the hospital. Spirometry, 6 min walking test (6MWT), and short form of health‐related quality of life scale (SF‐36) were applied in the sixth month. Chest computed tomography (CT) was performed and the findings were grouped according to lung involvement. Results Forty‐nine male and 16 female patients were included in the study. Forced expiratory volume in 1 s (FEV1)% values of 18 patients (30.5%), forced vital capacity (FVC)% values of 27 patients (45.8%), and 6MWT of 13 patients (23.2%) were found lower than expected in the sixth month. On the SF‐36 scale, physical function, energy‐vitality, social functionality, pain, and general health parameters were found lower than normal. Minimal interstitial changes in chest CT were seen in 26 patients. Nine patients had lung area involvement between 10% and 50% of the surface, there was a correlation between FEV1% and FVC% values in this group. There was severe pulmonary fibrosis in four patients. There was a correlation between pulmonary function and physical function and general perception of health from SF‐36 scale subparameters. Conclusion Functional and radiological abnormalities were detected in a significant number of patients in the sixth month after severe COVID‐19 pneumonia. A systematic monitoring plan must be established to assess and properly manage the long‐term problems that may arise.