To study the motor skills of the unaffected lower limb of patients with stroke, the visuo-motor skills of the unaffected lower limb in patients with stroke was compared with those in healthy control subjects using a computerized motor skill analyzer that calculated the accuracy in the tracking task in terms of lap time and trajectory error. Trajectory errors in the task by the unaffected lower limb in the patients with stroke were significantly greater than those in the lower limb of healthy control subjects. These results suggest that patients with stroke have impaired visuo-motor skills of the unaffected lower limb.