a sheet discharging device includes a guide member including a guide surface on which a conveyed sheet is guided , a plurality of sheet discharging rollers , which have an axis , arranged on a guide surface side of the guide member at intervals in a direction crossing a direction in which the sheet is conveyed , the sheet discharging rollers discharging the sheet guided on the guide surface , a sheet discharging tray on which sheets discharged by the sheet discharging rollers are stacked , and a plurality of projecting portions provided on the guide member and projecting from a plane on which the sheet discharging rollers contact the sheet , toward the axis of the sheet discharging rollers , to partly raise the sheet toward the axis of the sheet discharging rollers .