Abstract
The walking support device attached the wheel of three wheels or more in general, and adopts the caster circle for the front wheel. The caster has the merit that the walking support device can advance by an easy structure, and the turn etc. move. Especially, the caster is very advantageous for the turn. However, the fault that there is some unstable behavior is known to the bumpy road. Here, caster's merit is added and consideration of the method of supplementing the life, fault is added.
