In an image forming apparatus such as an inkjet printer, deformation of a thick recording paper sheet such as a postcard in the conveyance thereof is prevented by a simple and inexpensive structure. A rectangular aperture corresponding to a size of the postcard is formed on a first tray portion, and a second tray portion is attached to the rectangular aperture. The second tray portion is rotatably borne at a front end thereof on the first tray portion, and linked with the first tray portion at a rear end by link members so that the rotation angle of the second tray portion with respect to the first tray portion is restricted. When the second tray portion is opened, the second tray portion is held with an elevation angle with respect to a paper conveying path gentler than that of the first-tray portion, so that the postcard can be inserted into the paper conveying path with a gentle elevation angle. Consequently, the deformation of the postcard can be prevented.
