A document conveying device includes a sheet feeding tray, a sheet feeding mechanism, a sheet feeding tray lifting mechanism, a top plate, a fixed wall part, a lifting wall part, and a reflective optical sensor. The top plate is in contact with a lower surface of the document to be fed. The fixed wall part is provided extending downward from an upstream side end portion of the top plate, and is fixed in position. The lifting wall part is provided extending upward from a downstream side end portion of the sheet feeding tray, and lifted and lowered along the fixed wall part together with the sheet feeding tray. The reflective optical sensor detects the document placed on the sheet feeding tray. The reflective optical sensor emits light in a direction inclined downstream of the sheet feeding direction from a vertically upward direction.

A printing apparatus includes a discharge unit and a tray. The discharge unit discharges a recording medium printed by a print unit in a first direction. The tray includes a supporting surface that supports the recording medium discharged from the discharge unit, a protruding portion that forms part of the supporting surface and that protrudes in a second direction intersecting the first direction, and a convex portion that is provided on the supporting surface and that protrudes upward from the supporting surface. The convex portion is formed on an inner side of the protruding portion in the second direction and overlaps the protruding portion in the first direction.