Apparatus for stacking sheets of paper different in paper quality and for making a booklet-like product comprising any number of sheets of paper with a paper feeding part (1) for feeding a continuous web or webs of paper (7a, 7b; 7a', 7b') of a width or widths equal to and/or multiple of a product width; a superposing part (3) for superposing a plurality of continuous webs of paper, whereby a layered continuous sheet of paper is prepared; a cutting part (4) for cutting the layered continuous sheet into successive separate layered sheets of paper (15); a conveyance passage (17) along which the separate sheets are conveyed to travel; and a stacking and ejection part (5) for causing the separate layered sheets to be piled and ejected in the form of piles of sheets, each to form the booklet-like product.