A walking assistant harness attached to a leg of a trainee so as to assist walking of the trainee includes: a thigh frame placed along a front side or a rear side of a thigh of the trainee； and a thigh fixation belt connected to the thigh frame at a connection portion, so as to fix the thigh of the trainee to the thigh frame, and the connection portion includes a connecting position adjustment mechanism configured to adjust a connecting position with the thigh fixation belt in a right-left direction of the trainee.
