Abstract: The invention relates to apparatus for singulating flat articles which are transported on-edge as a stack (12) on a controllably driven conveyor (3) with a stack support (4) to the take-away station where the frontmost article (1) is taken away horizontally in a plane perpendicular to the feeding direction. The conveyor (3) and the stack support (4) are driven in a separately controlled manner. Detectors at different heights for determining the position of the frontmost article (1) can be individually moved horizontally in a plane perpendicular to the take-away reference plane in a controlled manner.