a second edge portion being positioned near a space between the upper main body portion pushed up by the opener assembly and the lower main body portion on a sheet feed unit side and extending at the side opposite to the first edge portion and in the crossing direction,
(7) the manual sheet feeder tray being positioned selectively for a working mode by bringing down the second edge portion by turning around the first edge portion, or for a non-working mode by turning up the second edge portion around the first edge portion as the turning axis to be fixed; and
(8) comprising a guide member for guiding the manual sheet feeder tray temporarily outside the upper main body portion in dosing the upper main body portion from an openand being hinged turnably to the lower main body portion at the side of the sheet discharge unit, and
(10) a second edge portion being positioned near a space between the upper main body portion pushed up by the opener assembly and the lower main body portion on a sheet feed unit side and extending at the side opposite to the first edge portion and in the crossing direction,
(11) the discharged-sheet tray being positioned selectively for a working mode by bringing down the second edge portion by turning around the first edge portion, or for a non-working mode by turning up the second edge portion around the first edge portion as the turning axis to be fixed, and
(12) the discharged-sheet tray overlapping a part of a side wall of