To provide a dosage determination support device precisely determining a dosage fitted to the health state of a user.

The dosage determination support device is provided with a sensor 28 measuring a glucose level obtained from the blood of the user, a memory 48 storing an arithmetic table showing a correspondence between the glucose level and the amount of insulin, a CPU 50 referring to the arithmetic table stored in the memory 48 and computing the amount of insulin corresponding to the glucose level, a display part 34 displaying the amount of the insulin, and a speech processing part 52 speech-processing the amount of the insulin and outputting the speech from a speaker 32.