PURPOSE: To perform discharge of paper sheets in order of a page according to a selected image forming mode, in an image forming device having various image forming modes.

CONSTITUTION: An image forming device comprises a device body 1 having a plurality of image forming modes, a discharge port 35 which is formed in the device body 1 and through which a paper sheet P having an image formed according to the image forming mode is discharged, a discharge tray 36 to receive the paper sheets P discharged through the discharge port 35 formed in the device body 1, and a turning-over means 41 which is arranged in the discharge tray 36 and selectively protruded and retracted from the discharge tray 36 according to a kind of the image forming mode and places the paper sheet P, discharged through the discharged port 35, on the discharge tray 36 in a turned-over state or without turning over the paper sheet.