After both-sides of the document is read at the reading unit, the both-sides image reading unit feeds the document to the third document feeding path (R3) which does not pass through the reading unit and rotates the faces of the document to be discharged in its original page order. In this apparatus, between the edge position of the document which is to be the upper end when its feeding direction is reversed toward the reading unit again after the reading of the front side of the document, and the edge position of the document which is to be the upper end when its feeding direction is reversed toward the discharging member after the reading of the reverse side of the document, the intersecting point (R) of the third document feeding path (R3) leading to the document discharging tray (7c) is employed and the changeover member (39) is employed at the intersecting point (R). The document which its reverse side has been read, is lead to the third document-feeding path (R3) and is discharged according to its original page order.