The first remaining amount holding unit stores the remaining amount of sheet detected by the remaining amount detection unit before a sheet adding operation to the sheet stacking surface. The second remaining amount holding unit stores the remaining amount of sheet detected by the remaining amount detection unit after the sheet adding operation to the sheet stacking surface. The determination unit determines a sheet adding position based on the respective remaining amount of sheet stored in the first remaining amount holding unit and the second remaining amount holding unit. The feeding speed control unit changes a sheet feeding speed of the pickup roller based on the sheet adding position determined by the determination unit and the sheet remaining amount detected by the remaining amount detection unit.