The present invention provides a sphygmomanometer which is easy to judge the timing of stopping the operation of a gas supply ball, and the timing of stopping the operation of the gas supply ball. Sphygmomanometer and sphygmomanometer device (1) provided with: a delivery balloon for delivering air to the interior space of the cuff； a display unit for conveying air to the interior space of the cuff； a display unit for supplying air to the interior space of the cuff； which detects the pressure of the internal space； a valve which detects the pressure of the internal space； a valve which detects the pressure of the internal space； a valve which detects the pressure of the internal space； for performing pressure reduction on the internal space, and a control unit for controlling the pressure sensor based on the pressure sensor, which is based on the pressure sensor, which is based on the pressure sensor, which is based on the pressure sensor, to calculate and display the pressure of the internal space (12) on the display unit. The control unit controls the display of the display unit in the following manner, that is, the display of the display unit is controlled in the following manner: when the pressure of the internal space is increased by the operation of the internal space, the internal space is detected, the internal space is detected, the internal space is detected, the internal space is detected, the internal space is detected, and the characteristic points in the pressure fluctuation, and according to the detection result of the characteristic points, the characteristic points, the continuous display of the pressure of the feature points is started.一種血壓計，易於判斷應當停止充氣球的操作的時機，該血壓計具有將空氣送入壓脈袋的內部空間的充氣球、顯示部、檢出該內部空間的壓力的壓力感測器以及將該內部空間減壓用的氣閥，其中該血壓計包含：基於來自該壓力感測器的輸出而計算該內部空間的壓力並且顯示於該顯示部的控制部，其中該控制部係控制該顯示部的顯示，該控制係在藉由該充氣球的操作讓該內部空間的壓力上升的期間，檢出該內部空間的壓力變動的特徵點，並且因應於該特徵點的檢出，以將該特徵點的壓力所接續的顯示予以開始。
