A compact multi-functional scanning apparatus includes a sheet-fed scanner, a casing and a flatbed scanner. The casing is attached to the sheet-fed scanner and has a recess. The flatbed scanner is movable between a retracted position within the recess and a deployed position outside the recess. In the deployed position the flatbed scanner is enabled to perform a flatbed-scanning task. An open end of the recess is located on a lateral side of the casing, and the flatbed scanner is movable into and out of the recess through the open end.