PURPOSE: To quickly load/unload a work and to make a machine setting space small in area by symmetrically providing a shaft with plural tables in such a way as to be freely turned via each shaft installed in a frame, and thereby providing a drive section turning the tables.

CONSTITUTION: After a pallet has been processed, it is transferred from an NC machine tool to a table 8A at the upper stage of a work supply device. When the electric motor 10 of the work supply device is operated with a button switch depressed by an operator, a rotating plate 7 is rotated by sprockets 20A, 20B and 20C, and shafts 8c via a pulley 11, a timing belt 12, a pulley 13 and the like, so that an upper and a lower table 8A and 8B are turned around each shaft 8c so as to be turned over. The upper and lower sprockets 20A and 20B are simultaneously rotated by an angle equivalent to that of the rotating plate 7 by a chain 17 winded onto the sprockets 20A and 20B. And when the upper table 8A takes the place of the lower table 8B in position, a limit switch provided in the inner surface of a support plate 5 is actuated, so that the electric motor 10 is thereby suspended.