A cash register including printing means for printing receipt information onto one area of a roll sheet and added-value information onto another area of the sheet; perforator means for rendering, as the sheet is fed, the printed area of the receipt information and the printed area of the added-value information in a readily separable state; and cutting means for cutting out the printed sheet from the roll sheet, so as to issue the cut sheet as a receipt provided with the added-value information is provided. Further, the perforator means comprises a circular blade having a saw-teeth shape and coaxially mounted on a roll sheet feeding shaft arranged on the way of the traveling path of the sheet, so as to form, as the sheet travels, a perforation-shaped cutting along a boundary line between the printed areas of the sheet.