Abstract: A device for the automatic reading of bar-codes comprises a sliding plane whereon a dragging section of a conveyor belt, having a plurality of windows consecutively aligned, is advanced. Each window defines, in the conveyor belt, two orientating edges perpendicularly arranged to form a right angle, whose vertex is oriented opposite to the feed sense of the conveyor belt itself. In each opening there is dropped an article provided with a bar-code to be read by a read head acting at a readout station, towards which the dragging section of the belt is moving. Through the feed of the belt, the article is shifted toward the readout station and is simultaneously arranged with two orthogonal sides in abutment with the orientating edges of the belt, in order to approach the readout station according to a prefixed orientation.