When in single-sided capturing mode(s), because image(s) of both sides of first original sheet(s) is or are captured by first and second capturing components 10, 23, front side(s) of the original(s) being identified based on the image(s) of both sides of the original(s), and either first or second capturing components 10, 23 being used to capture only image(s) of front side(s) of second and any subsequent original sheet(s), front side(s) of respective original(s) may be captured regardless of whether front side(s) of respective original(s) in original tray 22 face upward or downward. Furthermore, because during capturing of second and any subsequent original sheet(s), capturing of image(s) of back side(s) of original(s) by whichever of first and second capturing components 10, 23 is or are not engaged in capturing is aborted, lamp(s) for exposure belonging to this or these capturing components being turned OFF, reduction in power consumption is permitted.