The study involved 20 chronic stroke patients who trained for six weeks by applying a circuit exercise program. The patients were measured before and after the training program for respiratory muscle strength (MIP and MEP) and pulmonary function (FVC, FEV1, FEV1/FVC). A total of six circuit exercise programs were applied. A paired t-test was performed to determine the difference in respiratory muscle strength and pulmonary function of the subjects. The significance level was set to α=0.05. Respiratory muscle strength (MIP and MEP) increased significantly after the circuit exercise program. Pulmonary function (FVC1, FEV1/FVC) was also significantly higher after training than before training. However there was no significant change in lung function (FVC). The circuit exercise program was effective in improving both respiratory muscle strength and pulmonary function in chronic stroke patients. It is anticipated that circuit exercise programs can be applied to chronic stroke patients to improve and speed up their recovery.