Provided are a blood glucose monitoring device, which not only can signal the coming of a blood glucose monitoring point but also can automatically alarm selectively when blood glucose monitoring is especially needed, and a blood glucose monitoring method. The blood glucose monitoring device (10) comprises a timer unit (17) generating time data, a blood glucose-monitoring device body (18) for monitoring blood glucose, a scheduled blood glucose-monitoring point data memory unit (31) storing the data of scheduled blood glucose-monitoring point at which blood glucose is monitored by a blood glucose monitoring unit, a blood glucose data memory unit (30) storing the blood glucose data acquired by monitoring blood glucose by the blood glucose monitoring unit, and an alarm means (19) for sending an alarm to a driver. This blood glucose monitoring device has such a construction that the alarm means sounds exclusive in the case where the current time acquired by the timer unit has already reached the scheduled blood glucose-monitoring point and there exists some special information demanding the operation so that blood glucose should be especially monitored by the blood glucose monitoring unit.
