An automatic media feeder includes: a media stacker on which sheets are to be stacked; a discharged media stacker; a scanning position where the sheet is to be scanned; a first conveyance path from the media stacker to the scanning position; a feeding device configured to convey the sheet from the media stacker to the scan position along the first conveyance path; a discharging device configured to discharge the sheet that passed through the scanning position to the discharged media stacker; a first reverse mechanism configured to turn over the sheet conveyed from the media stacker toward the scanning position along the first conveyance path and return the turned-over sheet to the first conveyance path; and a second reverse mechanism configured to refeed the sheet that passes through the scanning position to the first conveyance path.