A sheet handling apparatus for storing a sheet in a storage bag having an opening, comprising: a housing; an inlet through which sheets can be inserted into the housing from the outside thereof; a transport unit configured to transport the sheets one by one inserted into the housing from the inlet; and a sheet storing mechanism configured to store the sheets transported by the transport unit in a storage bag having an opening, wherein the sheet storing mechanism comprises a plurality of sheet storing mechanisms and: a supporting unit configured to support a portion, near the opening, of the storage bag; a stage on which a part of the storage bag supported by the supporting unit is placed and configured to be movable in a vertical direction; a driving unit configured to move the stage in the vertical direction; and a pressing unit configured to be movable in the vertical direction and to move into the storage bag supported by the supporting unit, and press the sheets stored in the storage bag toward the stage, wherein the sheet handling apparatus further comprises: a recognition unit disposed at the transport unit and configured to recognize the sheets transported by the transport unit; a control unit configured to control the pressing unit and the driving unit; and a number information receiving unit configured to receive information on a number of the sheets transported to the storage bag, the number of the sheets being calculated based on the recognition result by the recognition unit, wherein the control unit stops an operation of storing a sheet in the storage bag on the condition that the number of sheets received by the number information receiving unit is less than a predetermined number, when a distance between the stage and the pressing unit that is pressing the sheets stored in the storage bag toward the stage is greater than a predetermined distance, and each of the sheet storing mechanisms includes a stage position detection unit configured to detect a position of the stage being configured to move in a predetermined movement range in the vertical direction, and the stage position detection unit comprises a first sensor configured to detect a to-be-detected plate mounted to the stage when the stage is positioned at a lower end in the predetermined movement range and a second sensor disposed above the first sensor. a housing; an inlet through which sheets can be inserted into the housing from the outside thereof; a transport unit configured to transport the sheets one by one inserted into the housing from the inlet; and a sheet storing mechanism configured to store the sheets transported by the transport unit in a storage bag having an opening, wherein the sheet storing mechanism comprises a plurality of sheet storing mechanisms and: a supporting unit configured to support a portion, near the opening, of the storage bag; a stage on which a part of the storage bag supported by the supporting unit is placed and configured to be movable in a vertical direction; a driving unit configured to move the stage in the vertical direction; and a pressing unit configured to be movable in the vertical direction and to move into the storage bag supported by the supporting unit, and press the sheets stored in the storage bag toward the stage, a supporting unit configured to support a portion, near the opening, of the storage bag; a stage on which a part of the storage bag supported by the supporting unit is placed and configured to be movable in a vertical direction; a driving unit configured to move the stage in the vertical direction; and a pressing unit configured to be movable in the vertical direction and to move into the storage bag supported by the supporting unit, and press the sheets stored in the storage bag toward the stage, wherein the sheet handling apparatus further comprises: a recognition unit disposed at the transport unit and configured to recognize the sheets transported by the transport unit; a control unit configured to control the pressing unit and the driving unit; and a number information receiving unit configured to receive information on a number of the sheets transported to the storage bag, the number of the sheets being calculated based on the recognition result by the recognition unit, wherein a recognition unit disposed at the transport unit and configured to recognize the sheets transported by the transport unit; a control unit configured to control the pressing unit and the driving unit; and a number information receiving unit configured to receive information on a number of the sheets transported to the storage bag, the number of the sheets being calculated based on the recognition result by the recognition unit, wherein the control unit stops an operation of storing a sheet in the storage bag on the condition that the number of sheets received by the number information receiving unit is less than a predetermined number, when a distance between the stage and the pressing unit that is pressing the sheets stored in the storage bag toward the stage is greater than a predetermined distance, and each of the sheet storing mechanisms includes a stage position detection unit configured to detect a position of the stage being configured to move in a predetermined movement range in the vertical direction, and the stage position detection unit comprises a first sensor configured to detect a to-be-detected plate mounted to the stage when the stage is positioned at a lower end in the predetermined movement range and a second sensor disposed above the first sensor.