Abstract: An apparatus for supplying cardboard is provided. The apparatus comprises a frame, a cardboard stack support means provided on said frame to detect a position of the front of the cardboard stack, cardboard stack support drive means, cardboard raising mechanisms mounted in said frame and capable of being in contact with the front of the cardboard stack at a reference position, a pair of feed rollers provided in said frame and above said cardboard stack raising mechanisms and compressed air jetting means facing the opposite sides of the laminar cardboard stack. The apparatus for supplying cardboards, which has the means described above, can readily and reliably supply laminar pulp cardboards one by one.