[Object] To provide a measuring apparatus capable of detecting a state of an enzyme reagent layer provided in a sensor.[Means for Solution] A measuring apparatus for measuring a substrate concentration by using a sensor including an enzyme reagent layer includes: state detecting means that applies a first voltage and a second voltage different from the first voltage to the sensor to detect a state of the enzyme reagent layer based on a difference between a first response current value obtained under application of the first voltage and a second response current value obtained under application of the second voltage.
