An ADF (Automatic Document Feeder) of the present invention includes a path for conveying a document from a scanning position, reversing the document to switch it back, and again reversing the document to thereby convey it toward a receipt tray positioned below a feed tray. Another path conveys the document away from the scanning position, reverses the document, and then conveys it to the receipt tray. Two path selectors selectively steer the document to either one of the above two paths. In both of a one-side mode and a both-side mode, the document is driven out of the ADF to the same receipt tray. The ADF promotes rapid conveyance and facilitates the removal of a jamming document.