PROBLEM TO BE SOLVED: To appropriately detect blood pressure fluctuation while suppressing a load on a subject.SOLUTION: A blood pressure measuring device includes a measurement wave detection part for detecting a measurement wave passing through a measurement region of a subject and generating a detection signal, a blood pressure analysis part for repetitively identifying the blood pressure of the subject by analysis of the detection signal, a state determination part for determining whether or not the subject is in a sleep state, a change determination part for determining whether or not a time change rate of the blood pressure exceeds a threshold, and a measurement control part for shortening a time interval when the blood pressure analysis part identifies the blood pressure, in the case where the state determination part determines that the subject is in a sleep state, and the change determination part determines that the time change rate exceeds the threshold.SELECTED DRAWING: Figure 3【課題】被験者に対する負荷を抑制しながら血圧変動を適切に検出する。【解決手段】被験者の測定部位を通過した測定波を検出して検出信号を生成する測定波検出部と、前記検出信号の解析により前記被験者の血圧を反復的に特定する血圧解析部と、前記被験者が睡眠状態にあるか否かを判定する状態判定部と、前記血圧の時間変化率が閾値を上回るか否かを判定する変化判定部と、前記被験者が睡眠状態にあると前記状態判定部が判定し、かつ、前記時間変化率が前記閾値を上回ると前記変化判定部が判定した場合に、前記血圧解析部が血圧を特定する時間間隔を短縮する測定制御部とを具備する血圧測定装置。【選択図】図３
