An automatic sheet original handling device comprises an original supporting member on which originals to be conveyed to an exposure station are piled, an original supporting glass plate for supporting the originals conveyed from the original supporting member for exposure, original conveying means for conveying the originals from the original supporting member to the original supporting glass plate, a reflecting plate having a concavo-convex surface having an angle of inclination of 120.degree. or greater and provided as near as possible to the back side of the original on the original supporting glass plate, and an original receiving member in which the originals conveyed and discharged from the original supporting glass plate by the original conveying means can be contained and piled.