The present invention is directed to providing a banknote stacking apparatus capable of stably stacking banknotes even when various types of banknotes are stacked therein by preventing banknotes stacked in the banknote stacking space from being blown away. The banknote stacking apparatus includes a stacker for stacking banknotes in the banknote stacking space; a push plate for supporting the banknotes stacked in the banknote stacking space and be movable in a reciprocating direction; a stack guide configured to guide the banknote which passes the stacker to be loaded into the banknote stacking space; a damper configured to press the banknote introduced into one side of the banknote stacking space toward the push plate located on the other side of the banknote stacking space; and a damper driver operating the damper to move in a direction toward the banknote stacking space and a direction away from the banknote stacking space.