Gait is altered in Parkinson's disease (PD) patients. It has been shown that treadmill training with visual and auditory cues is useful in improving the gait's parameters in patients in early-moderate stages of disease. No data are available about the effectiveness of this training in those subjects in advanced stages of PD. The first aim of this study was to evaluate the effect of a gait training using treadmill with visual and auditory cues in patients in stages IV Hoehn & Yahr (H&Y). The second aim was to compare the obtained data of these patients in advanced stages with those in mild to moderate stages.