The invention relates to a grouping device (1) for processing a fast running series of individual sheets, said grouping device having several conveying means for transporting said sheets which pass at least one delivery area and at least one conveying area. Said conveying means have at least one transport means (10; 15; 16) and at least one removal means (14), wherein said device comprises at least one grouping table (18; 19), said delivery area as well as the stacking area having an adjustable length and said transport means (10) acting exclusively in said conveying area of said sheets in order to avoid smearing of said sheets.