Purpose : The purpose of this study was to determine effect of Medical Exercise therapy on walking ability and ankle muscles activation after stroke. Method : Participants were randomly divided into either MET training group(n=12) and control group(n=12). All of participants had been receving a traditional rehabilitation program, 5 days a week. MET training group have additionally undergone for six weeks, 3 days a week, the MET program. But control group was not received any additional program except the traditional rehabilitation program. The 10 mWT, F8WT and 2 MWT to measure walking ability were carried out twice before and after training. Muscular activity of the ankle was estimated by analyzing the RMS of action potential for EMG in terms of tibialis anterior muscle(TA), soleus(SO), gastrocnemius medial head(GM), gastrocnemius lateral head(GL). Rresults : At the walking ability, MET training group demonstrated a significant improvememt in the score of the 10 mWT(p<0.001), 2 MWT(p<0.05), but F8WT was not significant improvement(p>0.05). At the ankle muscle activation, MET training group demonstrated a significant improvememt in the RMS of the TA(p<0.01) and SO(p<0.05) but GM(p>0.05) and GL(p>0.05) were not significant improvement. Conclusion : From these results of this study, MET training for 6 weeks has an effect on improvement of walking ability and ankle muscles activation after stroke.