Abstract: A coin-processing device for sorting and processing various sized coins, having a diameter-presetting member and a thickness-presetting member respectively defining the maximum width and height of a coin passageway which are actuated and preset simultaneously and adjustably by a control mechanism operated manually through a single control knob thereby to classify each kind of coin to be processed (e.g., to be counted), coins being driven along the passageway by an endless belt, which is movably supported so as to adapt itself to the thickness of each kind of coin and adapted to be adjusted at its height in response to adjustment of said control mechanism. Presetting of the diameter-manipulation member simultaneously actuates plates defining a coin entrance to the passageway thereby to preset the shape and size of the entrance to suit each kind of coin.