A drive device has a motor for generating a drive force, a power transmission unit for transmitting the force generated by the motor to first and second foot support tables, thereby moving the foot support tables, and a control unit for controlling the motor. The power transmission unit is connected to an output shaft of the motor. The power transmission unit has a left foot reciprocation mechanism for reciprocating a left foot support table, a right foot reciprocation mechanism for reciprocating a right foot support table, and a power divergence unit for diverging the force of the motor into the reciprocation mechanisms and transmitting the force thereto. The power transmission unit alternately transmits the rotation force of the motor to the left and right foot support tables, thereby causing the left and right foot support tables to alternately move in a forward and backward direction in increments of one reciprocation.
