Stroke survivors have difficulty in balance and postural control for standing upright because they are impaired by asymmetric posture, abnormal body imbalance, and deficit of weight transfer3). Asymmetric movement also decreases ability to stand upright, disorients the body midline and space, and hinders appropriate alignment between vertebrae, trunk rotation, selective movement between trunk and extremities, anterior-posterior tilt of the pelvis during weight transfer, protective reaction, and equilibrium reaction4). Previous studies have demonstrated the particular importance of trunk control in stable walking and decreasing falling risk in stroke patients