Sheet stacking device, counter ejector, and box making machine

A sheet stacking device comprising:

• a hopper unit on which box making sheet material is stacked;
• a ejection unit that ejects the box making sheet material to the hopper unit;
• a first blowing device that is disposed above the downstream side of the hopper unit in the transfer direction of the box making sheet material and that presses the box making sheet material downward by blowing air;
• a pressing device that is disposed above an upstream side of the hopper unit in the transfer direction of the box making sheet material and that presses the box making sheet material downward;
• and
• a control device that controls an operation of the first blowing device pressing a front end of the box making sheet material downward, and controls an operation of the pressing device so as to press a rear end of the box making sheet material downward with a pressing force higher than that applied to the front end of the box making sheet material.