Paper sheet processing device and partition card

A paper sheet processing device comprising:

• a charging inlet that takes in paper sheets in a conveyance direction, the paper sheets including at least one target sheet and a partition card overlapped on the target sheet, the partition card having a main surface portion having at least one identification hole group, the identification hole group having at least two through holes arranged along the conveyance direction;
• a detection unit that detects take-in of the paper sheets by the charging unit, and detects the identification hole group;
• and
• a control unit that determines a paper sheet take-in of which have been detected by the detection unit is the partition card in a case where the identification hole group has been detected by the detection unit, the control unit determining that a paper sheet take-in of which have been detected by the detection unit is the target sheet in a case where the identification hole group has not been detected by the detection unit.