An object of the present invention is to provide a blood pressure measurement device which enables blood pressure measurement only by attaching an electrode to one part of the body. The blood pressure measurement device according to the present invention measures the potential difference between the first electrode and the second electrode, the first electrode and the second electrode brought into contact with the body surface near the artery, and at least a predetermined portion of the electrocardiogram is generated An electrocardiogram measuring means for obtaining one time, a pulse wave detection means for detecting pulse wave information from the body surface in the vicinity of the artery, and a second time when a predetermined means of pulse waves is generated from the pulse wave information Pulse wave measurement means, pulse wave propagation time calculated from the first time and the second time, estimated blood pressure based on the relationship between the pulse wave propagation time and the pulse wave propagation time and blood pressure value defined in advance And calculating means for calculating blood pressure.本発明の目的は、電極を身体の１つの部位に装着するだけで血圧測定を可能にする血圧測定装置を提供することである。本発明の血圧測定装置は、動脈付近の体表に接触させる第１電極と第２電極、前記第１電極と前記第２電極の電位差を計測し少なくとも心電図のうちの所定の部分が発生した第１の時間を得る心電図計測手段、前記動脈付近の体表より脈波情報を検出する脈波検出手段、前記脈波情報から脈波のうちの所定の手段分が発生した第２の時間を得る脈波計測手段、前記第１の時間と前記第２の時間から脈波伝播時間を算出し、前記脈波伝播時間と予め規定した脈波伝播時間と血圧値との関係性に基づいて推定血圧を算出する血圧推定手段を含むことを特徴とする。
