A conveying apparatus comprises a driving motor, a driving arm driven by the driving motor and a conveyor table connected with the front end of the driving arm. The output of the driving motor is transmitted to the driving arm through a drag driven decelerator which comprises a circumscribed axes, a plurality of intermediate axes arranged around the outer periphery of the circumscribed axes, an inscribed cylinders inscribing the outer periphery of the intermediate axes, and a bracket having a pair of plates connected by a supporting member, wherein an input is introduced from the circumscribed axis and an output is taken from the bracket. |