As for this application, the central contraction phase blood pressure of the suffering inspection person (cSBP) in regard to the device and method in order to presume, the peripheral blood pressure ripple mark of the pulse beat of the aforementioned suffering inspection person and two in the heart period of the aforementioned suffering inspection person peripheral blood pressure measurable quantities deciding at least, it processes the aforementioned peripheral blood pressure ripple mark with transfer function, gives the estimator of the central blood pressure ripple mark of the pulse beat of the aforementioned suffering inspection person. The description above in the heart period of the aforementioned suffering inspection person at least the aforementioned peripheral blood pressure ripple mark of the pulse beat of two peripheral blood pressure measurable quantities and the aforementioned suffering inspection person on the peripheral artery of the aforementioned suffering inspection person is decided substantially at the same place. With the estimator of the aforementioned central blood pressure ripple mark of the pulse beat of the aforementioned suffering inspection person, it can give the estimator of the central contraction phase blood pressure of the aforementioned suffering inspection person.本出願は、被検者の中心収縮期血圧(cSBP)を推定するための装置および方法に関し、前記被検者の脈拍の末梢血圧波形および前記被検者の心周期における少なくとも2つの末梢血圧測定値を決定して、前記末梢血圧波形を伝達関数で処理し、前記被検者の脈拍の中心血圧波形の推定値を与える。前記被検者の心周期における前記少なくとも2つの末梢血圧測定値および前記被検者の脈拍の前記末梢血圧波形は、前記被検者の末梢動脈上の実質的に同じ場所で決定される。前記被検者の脈拍の前記中心血圧波形の推定値により、前記被検者の中心収縮期血圧の推定値が与えられる。