Abstract
It is important for the aged persons or the handicapped persons to walk on their legs because of making recover their leg's function or having own volition to participant the society. Walk is a motion of the body center, which moves back and forward, up and down, and right and left, by bending and stretching the legs. Some walk training machines have developed until now using the mechanism to vibrate the floorboard up and down, however some problems occurred. Anew walk training machine with forkhft mechanism using vertical vibration of floorboard is proposed and developed. It is shown by measuring the paths of aged person's physical parts and the reaction force of floorboard that the new machine is useful to compare with the former machines.
