To provide an image forming device improving recording material take-out performance while securing small space of the device.

A paper discharge tray 7 taking a first position of being enclosed in a device body 10 and a second position of being protruded outside of the device body 10, and provided facing a discharge part E for discharging recording material 4 after image formation, in the first position, is slidably supported on the device body 10. This paper discharge tray 7 is provided with an engaging part 20, and an engaging member 24 driven by a drive source 25 constituting an advancing/retreating means 8 is engaged with the engaging part 20 to move the paper discharge tray 7 selectively into the first position and the second position.