An apparatus for measuring blood circulation disorders using a pulse wave transit time, comprising: a measurement unit configured to measure a pulse wave at at least one part of the body of a subject and an electrocardiogram of the subject, wherein the measurement unit is configured to measure a pulse wave of at least one of a carotid artery, a brachial artery, a radial artery and a femoral artery; a detection unit configured to detect time information of a peak value point of the electrocardiogram and time information of a peak value point and a foot value point of each of the pulse wave signals measured by the measurement unit; an operation unit configured to calculate average pulse wave transit times using the time information detected by the detection unit and calculate a blood circulation disorder determination index using the average pulse wave transit times; and a diagnosis unit configured to diagnose a blood circulation disorder using the blood circulation disorder determination index; wherein the blood circulation disorder discrimination index includes a disease group/normal group determination index for determining a vascular disease; wherein the operation unit is configured to calculate the disease group/normal group determination index using at least one of a value A1=EFf/EBf obtained by dividing EFf by EBf, a value A2=EFf/ERf obtained by dividing EFf by ERf, a value A3=CFf/CBf obtained by dividing CFf by CBf and a value A4=CFf/CRf obtained by dividing CFf by CRf; wherein the EFf is a parameter indicating an average pulse wave transit time between the peak value point of the electrocardiogram and the foot value point of the pulse wave measured at a femoral artery, the EBf is a parameter indicating an average pulse wave transit time between the peak value point of the electrocardiogram and the foot value point of the pulse wave measured at a brachial artery, the ERf is a parameter indicating an average pulse wave transit time between the peak value point of the electrocardiogram and the foot value point of the pulse wave measured at a radial artery, the CFf is a parameter indicating an average pulse wave transit time between the foot value points of the pulse waves measured at a carotid artery and a femoral artery, the CBf is a parameter indicating an average pulse wave transit time between the foot value points of the pulse waves measured at a carotid artery and a brachial artery, and the CRf is a parameter indicating an average pulse wave transit time between the foot value points of the pulse waves measured at a carotid artery and a radial artery. a measurement unit configured to measure a pulse wave at at least one part of the body of a subject and an electrocardiogram of the subject, wherein the measurement unit is configured to measure a pulse wave of at least one of a carotid artery, a brachial artery, a radial artery and a femoral artery; a detection unit configured to detect time information of a peak value point of the electrocardiogram and time information of a peak value point and a foot value point of each of the pulse wave signals measured by the measurement unit; an operation unit configured to calculate average pulse wave transit times using the time information detected by the detection unit and calculate a blood circulation disorder determination index using the average pulse wave transit times; and a diagnosis unit configured to diagnose a blood circulation disorder using the blood circulation disorder determination index; wherein the blood circulation disorder discrimination index includes a disease group/normal group determination index for determining a vascular disease; wherein the operation unit is configured to calculate the disease group/normal group determination index using at least one of a value A1=EFf/EBf obtained by dividing EFf by EBf, a value A2=EFf/ERf obtained by dividing EFf by ERf, a value A3=CFf/CBf obtained by dividing CFf by CBf and a value A4=CFf/CRf obtained by dividing CFf by CRf; wherein the EFf is a parameter indicating an average pulse wave transit time between the peak value point of the electrocardiogram and the foot value point of the pulse wave measured at a femoral artery, the EBf is a parameter indicating an average pulse wave transit time between the peak value point of the electrocardiogram and the foot value point of the pulse wave measured at a brachial artery, the ERf is a parameter indicating an average pulse wave transit time between the peak value point of the electrocardiogram and the foot value point of the pulse wave measured at a radial artery, the CFf is a parameter indicating an average pulse wave transit time between the foot value points of the pulse waves measured at a carotid artery and a femoral artery, the CBf is a parameter indicating an average pulse wave transit time between the foot value points of the pulse waves measured at a carotid artery and a brachial artery, and the CRf is a parameter indicating an average pulse wave transit time between the foot value points of the pulse waves measured at a carotid artery and a radial artery.