Problem to be solved: to provide a blood pressure measuring apparatus for estimating blood pressure values with high accuracy.The blood pressure measuring apparatus is a first reference point determining means for determining a predetermined first reference point of the heart wave of the heart wave signal detected by the heart wave detecting means, and a second reference point determining means for determining a predetermined second reference point of the pulse wave of the pulse wave signal detected by the pulse wave detecting means A pulse wave propagation time calculating means for calculating the pulse wave propagation time based on the time difference between the second reference point to the first reference point and the pulse wave propagation time correcting pulse wave propagation time calculated by the pulse wave propagation time calculating meansA relationship determining means for determining the relationship between the pulse wave propagation time corrected by the pulse wave propagation time correcting means and the reference blood pressure value input by the reference blood pressure value input means and the regression formula based on the relationship determined by the relationship determining means are used, and the pulse wave propagation time correcting means is sequentially sequenced by the pulse wave propagation time correcting means Based on the corrected pulse wave propagation time, there is provided a blood pressure value estimating means for sequentially estimating the blood pressure value of the organism to obtain the estimated blood pressure value.Diagram【課題】 高い精度で血圧値を推定する血圧測定装置を提供する。【解決手段】 血圧測定装置は、心電波検出手段により検出された心電信号の心電波の予め定めた第1基準時点を決定する第1基準時点決定手段と、脈波検出手段により検出された脈波信号の脈波の予め定めた第2基準時点を決定する第2基準時点決定手段と、第1基準時点に対する第2基準時点の時間差に基づいて脈波伝搬時間を算出する脈波伝搬時間算出手段と、脈波伝搬時間算出手段により算出された脈波伝搬時間を補正する脈波伝搬時間補正手段と、脈波伝搬時間補正手段により補正された脈波伝搬時間と基準血圧値入力手段により入力された基準血圧値との間の関係を決定する関係決定手段と、関係決定手段により決定された関係に基づいた回帰式を用い、脈波伝搬時間補正手段により逐次求められる補正された脈波伝搬時間に基づいて生体の血圧値を逐次推定して推定血圧値を求める血圧値推定手段
