PROBLEM TO BE SOLVED: To provide a component measurement apparatus, a component measurement system, a medical instrument, and a program capable of making notification of an appropriate evaluation result according to a user or the user's condition.SOLUTION: A blood glucose meter 10A comprises: an evaluation data creation unit 82 for creating evaluation data which includes plural evaluation sections each having preset blood glucose value range, on the basis of the average blood glucose measured value and standard deviation of the predetermined number of blood glucose values measured in the past； an evaluation section determination unit 86 which determines, using the evaluation data, the evaluation section of blood glucose value range to which the current blood glucose measured value belongs； a window data creation unit 88 for creating evaluation window data corresponding to the determined evaluation section； and a data output unit 77 for outputting the evaluation window data to a display unit 30.
