We have developed an effective noncontact technique for the measurement of the electric potential of the human body when performing a stepping motion. This technique is based on the detection of an electrostatic-induced current generated by the stepping motion. The electric potential of the subject is determined by integrating the electrostatic-induced current flowing through an electrode that is placed at a distance of 1.5 m from the subject with respect to time. The values of the estimated electric potential are qualitatively in good agreement with those obtained in previous experiments by using an ordinary contact-type hand electrode. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.