To prevent the generation of a scar to paper by differentiating the diameters of a plurality of discharge rollers fitted to a discharge roller shaft.

The diameters of discharge rollers 3b are small, and the height of discharged paper 2 to a stacker 5 is higher on the outside than on the inside. The paper 2 is thereby placed in a U-shape bent state to impart stiffness to the paper 2. The paper 2 is therefore fed floating without coming in contact with the stacker 5 up to a position far from discharge rollers 3a, 3b and lands on the stacker 5. The discharged paper 2 is stacked orderly on the stacker 5. On the contrary, the diameters of the discharage rollers 3a can be made small, or discharge rollers with different diameters can be alternately arranged. With this constitution, the effect of reducing the number of part items and not generating a scar is obtained.