The aim of our study was to assess the dyspnea changes in chronic obstructive pulmonary disease patients during physical rehabilitation. 39 patients with obstructive pulmonary disease participated in this study: 21 patients were treated with standard medications and physical rehabilitation with the use of respiratory muscles training devices, 18 patients were treated with medications only. The intensity and changes of dyspnea were measured by baseline dyspnea index and transition dyspnea index. The exercise tolerance increased significantly (distance during 6-min walking test increased by 103 m) in the first group as well as lung function (forced expiratory volume increased in the 1st second by 9.6 %pred., functional residual capacity and residual volume decreased by 10.4 and 17.5 %pred., respectively). Significant decrease of dyspnea severity (transition dyspnea index changed by 3.3 points) was noted. There were no significant reliable changes in the control group.