A finger arterial dilatability testing method for testing a vasodilation response of finger arteries, the method comprising: a pulse wave data storage step of storing, for each of the finger arteries of fingers of both hands that are clamped in accordance with a predetermined sequence, pulse wave data at the time of rest and pulse wave data at the time of reperfusion after one forearm is caused to undergo occlusion, or for each of the finger arteries of different fingers of one hand that are clamped in accordance with a predetermined sequence, pulse wave data at the time of rest and pulse wave data at the time of reperfusion after one forearm is caused to undergo occlusion; an NPV calculation step of calculating, on the basis of the pulse wave data stored in the pulse wave data storage step, a normalized pulse volume, which is obtained by dividing the amplitude of an AC component of a pulse wave by the average of a DC component of the pulse wave, for each heartbeat; a pulse pressure data acquisition step of acquiring pulse pressure, which is obtained by subtracting a diastolic blood pressure from a systolic blood pressure; and an FCR ratio calculation step of calculating an index representing a vasodilation response of the finger arteries (FCR ratio) for each heartbeat, the FCR ratio being the ratio between compliance indices for both hands at the time of reperfusion normalized by the ratio between the compliance indices for both hands at the time of rest, the compliance index being an index obtained by dividing the normalized pulse volume calculated in the NPV calculation step by the pulse pressure acquired in the pulse pressure data acquisition step, or the FCR ratio being the ratio between the compliance indices for different fingers of one hand at the time of reperfusion normalized by the ratio between the compliance indices for different fingers of one hand at the time of rest. a pulse wave data storage step of storing, for each of the finger arteries of fingers of both hands that are clamped in accordance with a predetermined sequence, pulse wave data at the time of rest and pulse wave data at the time of reperfusion after one forearm is caused to undergo occlusion, or for each of the finger arteries of different fingers of one hand that are clamped in accordance with a predetermined sequence, pulse wave data at the time of rest and pulse wave data at the time of reperfusion after one forearm is caused to undergo occlusion; an NPV calculation step of calculating, on the basis of the pulse wave data stored in the pulse wave data storage step, a normalized pulse volume, which is obtained by dividing the amplitude of an AC component of a pulse wave by the average of a DC component of the pulse wave, for each heartbeat; a pulse pressure data acquisition step of acquiring pulse pressure, which is obtained by subtracting a diastolic blood pressure from a systolic blood pressure; and an FCR ratio calculation step of calculating an index representing a vasodilation response of the finger arteries (FCR ratio) for each heartbeat, the FCR ratio being the ratio between compliance indices for both hands at the time of reperfusion normalized by the ratio between the compliance indices for both hands at the time of rest, the compliance index being an index obtained by dividing the normalized pulse volume calculated in the NPV calculation step by the pulse pressure acquired in the pulse pressure data acquisition step, or the FCR ratio being the ratio between the compliance indices for different fingers of one hand at the time of reperfusion normalized by the ratio between the compliance indices for different fingers of one hand at the time of rest.