PROBLEM TO BE SOLVED: To provide a blood pressure estimation device that can measure a blood pressure continuously without any burden on a body of a subject, and to provide a sphygmomanometer, a blood pressure estimation system, and a blood pressure estimation method.SOLUTION: A blood pressure estimation device includes: a plurality of sensors 120 for detecting a pulse wave of a subject without applying the subject with a pressure that is higher than a prescribed pressure； and a control part 160 for continuously calculating an estimation value of blood pressure of the subject based on an actually measured value of blood pressure of the subject acquired from a sphygmomanometer 200 and output from the sensors 120.SELECTED DRAWING: Figure 1【課題】被検者の身体への負担なく継続的に血圧を測定できる血圧推定装置、血圧計、血圧推定システム、及び血圧推定方法を提供する。【解決手段】被検者に所定の圧力より高い圧力をかけずに被検者の脈波を検出する複数のセンサ１２０と、血圧計２００から取得される被検者の血圧の実測値とセンサ１２０の出力とに基づいて、被検者の血圧の推定値を継続して算出する制御部１６０とを備える。【選択図】図１
