In a collator for use in combination with an electrophotographic copying machine which discharges copies of originals in succession at the same time interval, deflection claws for delivering successive copies of a manuscript into successive bins are provided at inlets of respective bins and two endless belts each having an actuator for driving the deflection claws are provided movably along the successive bins. The two endless belts are driven by two different controlling circuits, respectively in an independent manner. During the copy delivering operation by the first endless belt for a plurality of copies of a certain document, it is possible to initiate the copy delivering operation by the second endless belt for a plurality of copies of the next document.