Asthma is a chronic airway disease with an underlying inflammatory component. Its prevalence has increased dramatically recently. A new guideline in the treatment of asthma is the pulmonary rehabilitation program in the form of exercise training and this is in addition to drug therapy. The aim of the work of our study was to show the clinical and functional improvement in asthmatic children after a schedualized training program, and to evaluate the efficacy of physical activity on both symptoms and pulmonary functions, aiming to modify the asthmatic children's life style. Forty asthmatic children with moderate persistent asthma aged from 6 to 12 years were categorized into two groups, Group A:. Comprised 20 asthmatic children, who received inhaled corticosteroids and oral Montelukast and had undergone a rehabilitation program, with mean age was (7.95) years. Group B: comprised 20 asthmatic children who received inhaled corticosteroids and oral Montelukast, with mean age was (8.32) years. The ventilatory function tests were done to both groups before and after treatment. There was a highly significant improvement in all ventilatory variables (FVC%, FEV1%, FEV1/FVC%, FEF25% FEF50% FEF 25-75% and MVV%) after treatment in Group A, P=<0.001, and Group B ,P=<0.001. Our results support the notion that the pulmonary rehabilitation program should be an integral part in the management of asthma as was proved in Group (A).