A document feeding device comprises a document input tray, a document output tray placed above the document input tray, and a feeding mechanism provided for a feeding path (connecting the document input tray and the document output tray via a scanning position) to feed each document along the feeding path. The document output tray includes a reference tray and a pivoting tray (on the downstream side of the reference tray) pivotable with respect to the reference tray around a pivot shaft on the upstream side of the pivoting tray. The pivoting of the pivoting tray is restricted at a retracted position by a pivot restricting part when the pivoting tray has pivoted from a document stacking position to the retracted position. The pivot shaft is situated above an upstream end of a stacking surface of the pivoting tray when the pivoting tray is placed at the document stacking position.