Abstract: An unpackaging apparatus for packaged sheets is disclosed. The apparatus automatically takes out sheets by unpackaging a packaging sheet containing the packaged sheets used for a printer or the like. The packaging sheet is carried from a packaging sheet loading unit to a transfer unit by adsorptively holding the packaging sheet with a carrier mechanism. The packaging sheet is guided to a predetermined position of an unpackaging unit with a guide mechanism provided in the transfer unit. The front and side faces of the packaging sheet are cut off to vertically expand the packaging sheet. The sheets are removed from the packaging sheet and rearranged by a sheet rearranging mechanism. The sheets are loaded in a housing unit. The empty packaging sheet from which the sheets have been removed is discharged from a part vicinal to the unpackaging unit by a discharge mechanism.