A media processing apparatus adapted to sequentially process plate-shaped media, comprising: a main body; a media stacker (21, 22) provided in the main body and configured to accommodate a plurality of plate-shaped media therein; a processor (41, 11) provided in the main body and configured to perform at least one of writing data on a plate-shaped media, reading data from the media and printing on the media; the main body is provided with an opening for exposing the processor (41, 11) to the outside and a door which is configured to open and to close the opening, characterised in that it comprises: a drawer tray provided in the main body and including a stacker portion which is configured to accommodate a plurality of processed plate-shaped media; a media transfer mechanism provided in the main body and configured to sequentially transport a blank medium from the media stacker (21, 22) to the processor (41, 11) and transport a processed medium from the processor (41, 11) to the stacker portion of the drawer tray; wherein the drawer tray is movable between an accommodated position, where the drawer tray is capable of receiving the processed media from the media transfer mechanism, and a drawn position, where the drawer tray is pulled out from the main body to allow the take out of the processed media accommodated in the drawer tray, and the media processing apparatus further comprising: a tray accommodation sensor that detects whether the drawer tray is positioned at the accommodation position; and a control unit that stops a media discharge process of discharging the media into the drawer tray when the tray accommodation sensor detects that the drawer tray is not positioned at the accommodated position; wherein the drawer tray is movable between the accommodated position and the drawn position while the door is closed, and wherein the drawer tray is configured to accommodate a plurality of disk media that are coaxially stacked. a main body; a media stacker (21, 22) provided in the main body and configured to accommodate a plurality of plate-shaped media therein; a processor (41, 11) provided in the main body and configured to perform at least one of writing data on a plate-shaped media, reading data from the media and printing on the media; the main body is provided with an opening for exposing the processor (41, 11) to the outside and a door which is configured to open and to close the opening, characterised in that it comprises: a drawer tray provided in the main body and including a stacker portion which is configured to accommodate a plurality of processed plate-shaped media; a media transfer mechanism provided in the main body and configured to sequentially transport a blank medium from the media stacker (21, 22) to the processor (41, 11) and transport a processed medium from the processor (41, 11) to the stacker portion of the drawer tray; a drawer tray provided in the main body and including a stacker portion which is configured to accommodate a plurality of processed plate-shaped media; a media transfer mechanism provided in the main body and configured to sequentially transport a blank medium from the media stacker (21, 22) to the processor (41, 11) and transport a processed medium from the processor (41, 11) to the stacker portion of the drawer tray; wherein the drawer tray is movable between an accommodated position, where the drawer tray is capable of receiving the processed media from the media transfer mechanism, and a drawn position, where the drawer tray is pulled out from the main body to allow the take out of the processed media accommodated in the drawer tray, and the media processing apparatus further comprising: a tray accommodation sensor that detects whether the drawer tray is positioned at the accommodation position; and a control unit that stops a media discharge process of discharging the media into the drawer tray when the tray accommodation sensor detects that the drawer tray is not positioned at the accommodated position; a tray accommodation sensor that detects whether the drawer tray is positioned at the accommodation position; and a control unit that stops a media discharge process of discharging the media into the drawer tray when the tray accommodation sensor detects that the drawer tray is not positioned at the accommodated position; wherein the drawer tray is movable between the accommodated position and the drawn position while the door is closed, and wherein the drawer tray is configured to accommodate a plurality of disk media that are coaxially stacked.