A blood glucose measuring instrument is provided which can output a guide for allowing a subject to take an appropriate countermeasure. The blood glucose measuring instrument capable of outputting voice includes first setting means for receiving a static limit value transmitted by wireless transmission from an external apparatus in accordance with a condition that the external apparatus has authenticated and setting the static limit value, storage means for classifying and storing blood glucose level data acquired by a blood glucose measurement based on classification according to the measurement timing, second setting means for calculating, using the blood glucose level data in the past stored in classified groups in the storage means, a dispersion for each classified group and setting a dynamic limit value based on the calculated dispersion, and notification means for comparing the blood glucose level data acquired by the blood glucose measurement with the static limit value and the dynamic limit value corresponding to the classified group to which the blood glucose level data belongs to notify output contents in accordance with a result of the comparison together with the blood glucose level data.
