This study is to investigate the effect of muscle strength in whole-body vibration. We performed experiment with 30-subjects and divided two groups. One group is training group with whole-body vibration; the other is control group with non-vibration. Training group is supplied with whole-body vibration 4-days a week and proceeded total 8-weeks. The results indicated that knee joint peak torque improved significantly in training group when knee extension and flexion using BIODEX unlike control group. Because that whole-body vibration may keep muscle tension and stimulate muscular fibers. This study can be used new training mode to normal people and rehabilitation or the elderly.