PROBLEM TO BE SOLVED: To provide a component measurement apparatus, a component measurement system, a medical instrument, and a program capable of promoting appropriate body fluid component control or vital sign control according to a user or the users condition while suppressing the stress to the user.SOLUTION: A blood glucose meter 10 comprises: an evaluation data creation unit 82 for creating evaluation data which includes plural evaluation sections each having preset range, on the basis of the predetermined number of blood glucose values measured in the past and an evaluation section determination unit 86 for determining the evaluation section of blood glucose value range to which the current blood glucose measured value belongs. The evaluation data creation unit 82 sets, on the basis of the predetermined number of blood glucose measured value in the past, one evaluation section positioned outmost such that the blood glucose measured values accounting for the preset ratio of the predetermined number belong to the one evaluation section.
