Background: Recent studies indicated that patients recovered after COVID-19 acute respiratory distress syndrome (ARDS) could develop abnormalities in pulmonary function. Aim: To evaluate the changes of lung functions in intensive care unit (ICU) COVID-19 survivors. Methods :A prospective study performed in a medical ICU from May 2021 to September 2021 including ICU COVID-19 ARDS survivors. Patients with chronic obstructive pulmonary disease (COPD) were excluded from the study. Spirometry was performed 3 to 6 months after ICU discharge. Restrictive ventilatory impairment was defined by total lung capacity (TLC) lower than 80%. Results: Forty-five patients were enrolled. Mean age was 47±10 years with male predominance in 62%. At ICU admission, patients were presented with dyspnea mMRC 3 and 4 in 37% and 24.4% respectively. High  flow nasal cannulae, non invasive and invasive ventilation were performed in respectively 90.9% ,15.6% and one case. Fifty-three percent of patients were discharged with long-term oxygen therapy. Forty-eight percent of patients retained baseline dyspnea after recovery, and 22.2% presented fibrosis on chest-scan. At spirometry follow-p, mean forced vital capacity (FVC), forced expiratory volume in the first second (FEV1) , and (FEV1/FVC) ratio were 3.3±0.8l, 2.9±0.7l, and 89±6.8%, respectively. Mean Residual volume (RV)and total lung capacity (TLC) were 2.4±0.6l and 3.9±0.8l, respectively. Restrictive ventilatory impairment was found in 77.8% of cases and 11 patients (24.4%) have a vital capacity lower than 80% of the predicted value. Conclusion: Restrictive ventilatory impairment was prevalent among ICU COVID-19 survivors. Further studies are needed to determine predictors of its occurrence.