A blood glucose measurement device comprises a sensor connector, a blood glucose value calculator, a barcode reader, a liquid crystal display, a data storage component, a report storage area, a central controller, and a touch sensor. The central controller causes the liquid crystal display to activate an input screen for inputting a comment for each measurement by the blood glucose value calculator. When a comment is inputted to the touch sensor, the central controller associates the comment with identification information in correspondence with each measurement by the blood glucose value calculator and stores the result in the report storage area. When a patient ID is read by the barcode reader, the central controller checks whether there is a comment on the basis of the information stored in the report storage area, and if there is a comment, the comment is displayed on the liquid crystal display.