Study will use Kinect for Xbox games for balance intervention. Investigators will recruit 60 patients with chronic stroke from Shung-ho hospital clinical rehabilitation and randomly assign participants to "standard treatment plus virtual reality group" (N=30) and "standard treatment only group" (N=30). There are total 12 sessions (2 times weekly) for both groups. Investigators will assess subjects' ability for 3 times (pre- and post-intervention, follow up in post 3 month).Investigators will also record the pleasure scale and adverse event after every training session. Hypothesis is that Kinect for Xbox intervention can significantly improve subjects' balance ability, confidence of balance, ADL, and QOL compared to the conventional rehabilitation. It may help to develop a new clinical model of virtual reality training for patients with chronic stroke.