The present invention provides a work sheet conveying and housing system which can efficiently convey and house work sheets and which, in a housed condition, prevents formed parts of the work sheets from being crushed. The work sheet conveying and holding system includes a work sheet stocker 4 and a work sheet conveying device 2. The work sheet stocker 4 has trays 34 in a plurality of stages the position of which can be switched between an inner position A where the trays 34 are housed in a tray housing portion 32 in a stocker frame 30 and an outer position B where the trays 34 are drawn out of the tray housing portion 32. The work sheet conveying device has work sheet holding means 20 capable of holding a work sheet W2, and moving means having a function of moving the work sheet holding means 20 parallel to a position switching direction corresponding to a direction in which the trays are drawn out. The moving means moves the work sheet holding means 20 parallel to the position switching direction to switch the position of the uppermost one 34 of the trays 34 in the plurality of stages located at the outer position B, to the inner position A and to position the work sheet holding means 20 above a tray located one stage below the uppermost tray 34.