In a paper sheet handling apparatus, communication part or parts (29) are arranged in a bottom part of an upper assembly (12) and communication part or parts (42) are arranged in an upper part of a lower assembly (14) for exchanging banknotes between the upper assembly (12) and the lower assembly (14). The number of the communication part or parts (29) of the upper assembly (12) and the number of the communication part or parts (42) of the lower assembly (14) are same. The position or positions of the communication part or parts (29) of the upper assembly (12) and the position or positions of the communication part or parts (42) of the lower assembly (14) match when the upper assembly (12) or the lower assembly (14) is reversed.

An image recording apparatus includes: a casing; a sheet-feeder tray having a supporting surface for supporting a sheet-shaped recording medium; a recording unit which is configured to record an image on the recording medium fed from the sheet-feeder tray; a discharge roller pair configured to discharge, from the casing, the recording medium on which the image has been recorded by the recording unit; an opening-closing member which is provided on the downstream of the discharge roller pair in a direction in which the recording medium is discharged by the discharge roller pair and is rotatable between a first position where a discharging slot of the recording medium discharged by the discharge roller pair is closed and a second position where the discharging slot is open; and a restricting mechanism configured to restrict the rotation of the opening-closing member from the second position to the first position.