A blood pressure measuring device capable of estimating blood pressure with high accuracy, and the like. The blood pressure measuring device 5007 measures the first pressure signal representing the internal pressure of the cuff 401 in the first period and the Korotkoff sound in the first period and based on the first pressure signal in the first period and the pulse in the first period A first blood pressure estimating unit 5004 for estimating a blood pressure based on a first pulse wave signal representing a wave, a first blood pressure estimating unit 5004 for estimating a blood pressure based on a first pulse wave signal representing a wave, a plurality of timings at which the first pulse wave signal satisfies a predetermined condition, , A pressure of the first pressure signal in the third period and calculates first pulse wave information in which the third period and the pressure are associated with each other； A blood pressure information generating unit 5005 for generating blood pressure information in which pulse wave information and the estimated blood pressure are associated with each other, a second pressure signal representing the internal pressure of the cuff in the second period, The second pulse wave signal Specifies the first pulse wave information similar or identical to the second pulse wave information calculated based on the first pulse wave information in the blood pressure information and stores the blood pressure associated with the identified first pulse wave information in the second period And a second blood pressure estimating unit 5006 for estimating the blood pressure in the second blood pressure estimating unit 5006.高精度に血圧を推定することができる血圧測定装置等を提供する。血圧測定装置５００７は、第１期間におけるカフ４０１の内圧を表す第１圧力信号及び該第１期間におけるコロトコフ音に基づき、または、該第１期間における該第１圧力信号及び該第１期間における脈波を表す第１脈波信号に基づき、血圧を推定する第１血圧推定部５００４と、該第１脈波信号が所定の条件を満たす複数のタイミングと、該タイミングの差分を表す第３期間と、該第３期間における第１圧力信号の圧力とを算出し、該第３期間と、該圧力とが関連付けされた第１脈波情報を算出する脈波算出部５００３と、算出した該第１脈波情報と、推定した該血圧とが関連付けされた血圧情報を作成する血圧情報作成部５００５と、第２期間における
