PURPOSE: To assuredly take out only the uppermost plate and transport it by rocking a plate adsorbing means up and down in a wave-form track portion to prevent double feeding.

CONSTITUTION: An advancing motion of a first reciprocating means 10 causes plate adsorbing means 18 to descend, and the top surface of the uppermost plate (a) stacked on a truck is adsorbed by an adsorbing pad 19. Then, a retrerting motion of the first reciprocating means 10 forces a sliding substance 23 to be brought into contact with a track 13, and after that, a second reciprocating means 12 is reciprocated to lift up the plate (a) absorbed by the pad 19 and move it forward. At this time, in a wave-form track portion 13a of the track 13, the plate adsorbing means 18 is rocked back and forth. This rocking motion forces the plate (a) to separate from a plate vacuum adsorbed on the plate (a), so only one plate (a) adsorbed on the adsorbing pad 10 is transported to a feed roller 14.