PURPOSE: To provide a footstool which can be stored in the plinth of a sink cabinet or furniture so as to secure a storage space in a close place, and can be moved, built up and folded by one foot so A that both hands can be used for another purpose.

CONSTITUTION: In the case of using a footstool with swivel wheels, a lock release pedal 6 is stepped on, and a footstool is built up by elasticity of an elastic body 4 such as a spring, a rubber or the like to be locked by an upper limit lock 5 and used. After use, the lock release pedal 6 is stepped on to release locking, and simultaneously a top plate is folded and locked by a lower limit lock to be stored with the swivel wheels.