Abstract: A device stacks sheet-shaped materials (1, 1′) on a sheet stack with at least one deflecting element (82, 82′), mounted above the sheet stack and in the area of the leading edges (6, 6′) of the stacked sheet-shaped materials (1, 1′) so that it can rotate, and exhibiting at least one deflecting fin (83, 83′), whereby deflecting element (82, 82′) is driven and mounted so that it can rotate, whereby one deflecting fin (83, 83′) is in contact with the topmost sheet-shaped material (1) of the sheet stack that has already been stacked so that the leading edge (6′) of the next sheet-shaped material (1) to be stacked is deflected until the deflecting element (82, 82′), after stacking this next sheet-shaped material (1′), rotates far enough that a deflecting fin (83, 83′) is in contact with this sheet-shaped material (1′) that is now lying topmost.