An objective of the present invention is to effect an improvement in measurement precision in a sphygmomanometer. The present invention is a sphygmomanometer, which is connected to a triple cuff, and which detects a cuff pressure in a depressurization procedure wherein a plurality of pulse wave components is superpositioned in time series, said sphygmomanometer comprising: a computation means for specifying, for each of the plurality of pulse wave components which are superpositioned in the detected cuff pressure, an amplitude peak point and a bottom point which appears in advance of the peak point, sequentially extracting a prescribed number of instances of contiguous pulse wave data between the bottom point and the peak point, computing an incline of a regression line for each instance of the extracted pulse wave data, deriving a fluctuation of the incline between the bottom point and the peak point, and computing a characteristic quantity based on a time difference between a time at which a derivative of the fluctuation is zero and the bottom point and a determination means for determining that the cuff pressure corresponding to the pulse wave component whereat the change between pulse wave components with respect to the characteristic quantity which is computed for each of the plurality of pulse wave components reaches a maximum is a systolic blood pressure value.Lun des objectifs de la présente invention est dapporter des améliorations à la précision de mesure dun tensiomètre. La présente invention concerne, donc, un tensiomètre relié à un brassard à triple sangles, capable de détecter la pression au niveau du brassard dans le cadre dune procédure de dépressurisation dans laquelle plusieurs composants donde de pouls sont superposés en série temporelle, ledit tensiomètre comprenant un moyen de calcul permettant de préciser, pour chacun des composants donde de pouls lesquels sont superposés dans la pression détectée au niveau du brassard, un point correspondant à
