Abstract: A sheet sorter including: a sheet feed passage having an outlet for feeding sheets one by one and a plurality of bin trays situated adjacent to the outlet for receiving sheets fed from the passage. Each said bin tray has a pair of training pins projecting outward from respective sides of an inlet end. These training pins are vertically guided so that the bin trays are held and stacked in a pile. A pair of Geneva cam wheels are used to shift the bin trays, successively, and simultaneously shift the outlet of the passage. The sheet feed passage is defined between upper and lower units accommodated in a sorter case. The upper unit is raised by opening a cover of the sorter case so that the sheet feed passage is opened and accessible for removing sheets jammed therein.