Abstract: A paper stacker for receiving a continuous web having prearranged longitudinally spaced lateral crease lines from a feed arrangement and laying the web down in a folded fashion at the lines to form a vertical stack on a stationary surface characterized by a piling device, guides for receiving the paper from the feed arrangement and guiding the web of paper to the piling device and a lifting device for elevating the piling device as the height of the stack increases. The guides are preferably formed by a pair of guide grids which face one another to provide a guide channel with each of the guide grids having individual guide members being positioned side-by-side and extending in a direction of movement of the web, each of the guide grids have an upper portion and a lower portion which are telescopically displaceable inside one another with the lower portion being connected to the pile device to move therewith and the upper portion being displaceably mounted on guide rods attached to the feed arrangement.