The invention provides a blood glucose meter having functions which could display simultaneously a high relavance and a plurality of continuous blood glucose levels on a display screen. When a blood glucose level table 307 recording measured blood glucose levels is accessed and previous measured blood glucose levels are displayed on a display part 309, a fluctuation of blood glucose levels before and after a meal could be easily understood when two relative blood glucose levels before and after the meal are displayed in a single screen. Therefore, a doctor could accurately diagnose whether a patient is properly taking the meal, and whether insulin is a administered properly.本發明提供一種具備可於顯示畫面上同時顯示關聯性高且多個連續的血糖值的功能的血糖計。讀取記錄有測定出的血糖值的血糖值表307，且於顯示部309上顯示過去測定出的血糖值時，藉由在單一畫面內顯示飯前與飯後的相關的兩個血糖值，從而一目了然地判斷飲食前後的血糖值的變動。因此，醫生可以更準確地弄清患者攝取的飲食是否適當、且服用的胰島素是否適當。
