A paper-sheet processing apparatus comprising: a casing; an operation unit and a display unit each provided on a front side of the casing; a take-in unit configured to take in paper sheets into the casing; a first transport unit configured to transport the paper sheets taken in by the take-in unit; a recognition unit configured to recognize each of the paper sheets transported by the first transport unit; a second transport unit positioned below the first transport unit and configured to transport the paper sheets recognized by the recognition unit; a plurality of stacking units (80,90) positioned below the second transport unit and configured to stack the paper sheets transported by the second transport unit; a first unit in which the take-in unit, the first transport unit and the recognition unit are at least partially provided; a second unit positioned below the first unit and in which the second transport unit and the stacking units (80,90) are at least partially provided; a third unit arranged at the first unit; and a fourth unit positioned above the third unit and arranged at the first unit, wherein: the first unit is configured to turn with respect to the second unit around a first horizontal shaft extending in a front and rear direction; the fourth unit is configured to turn with respect to third unit around a second horizontal shaft extending in the front and rear direction; an upper portion of the recognition unit is configured to turn together with the fourth unit; a lower portion of the recognition unit is configured to remain in the third unit; and the first horizontal shaft and the second horizontal shaft is the same horizontal shaft. a casing; an operation unit and a display unit each provided on a front side of the casing; a take-in unit configured to take in paper sheets into the casing; a first transport unit configured to transport the paper sheets taken in by the take-in unit; a recognition unit configured to recognize each of the paper sheets transported by the first transport unit; a second transport unit positioned below the first transport unit and configured to transport the paper sheets recognized by the recognition unit; a plurality of stacking units (80,90) positioned below the second transport unit and configured to stack the paper sheets transported by the second transport unit; a first unit in which the take-in unit, the first transport unit and the recognition unit are at least partially provided; a second unit positioned below the first unit and in which the second transport unit and the stacking units (80,90) are at least partially provided; a third unit arranged at the first unit; and a fourth unit positioned above the third unit and arranged at the first unit, wherein: the first unit is configured to turn with respect to the second unit around a first horizontal shaft extending in a front and rear direction; the fourth unit is configured to turn with respect to third unit around a second horizontal shaft extending in the front and rear direction; an upper portion of the recognition unit is configured to turn together with the fourth unit; a lower portion of the recognition unit is configured to remain in the third unit; and the first horizontal shaft and the second horizontal shaft is the same horizontal shaft. the first unit is configured to turn with respect to the second unit around a first horizontal shaft extending in a front and rear direction; the fourth unit is configured to turn with respect to third unit around a second horizontal shaft extending in the front and rear direction; an upper portion of the recognition unit is configured to turn together with the fourth unit; a lower portion of the recognition unit is configured to remain in the third unit; and the first horizontal shaft and the second horizontal shaft is the same horizontal shaft.