Information leakage prevention treatment for cutter

Information should be prevented from leaking (3), even though it appears in any site of the seat (2), the information can be selectively discarded, to allow reuse of the remainder of the paper. The peripheral surface of the rotary blade (10) that is run while pressing the sheet, an information leakage prevention processing cutter for separating the relevant part from the sheet, a plurality of the rotary blade, the axial direction of the rotary shaft (21) constructed by mounting a disk-shaped thin blade. Of the information displayed on the sheet, since it is possible to separate only part of the information to be prevented from leaking appears from the sheet, it is possible to effectively use the remaining paper as a resource.