PROBLEM TO BE SOLVED: To allow for measurement of an oxygen circulation period of a subject without direct detection of respiration.SOLUTION: A biological information measurement device 10 comprises: a photoelectronic sensor 11 receiving light having a first wavelength and light having a second wavelength and having transmitted a measurement portion of a subject, then outputting a first light reception signal corresponding to the light having the first wavelength and second light reception signal corresponding to the light having the second wavelength； a respiration re-start period identification part 41 identifying a first period at which respiration of the subject is started again, based on variation of amplitude of the first light reception signal； an oxygen saturation degree recovery period identification part 31 identifying a second period at which an oxygen saturation degree on the measurement portion is shifted from decrease to increase, based on the first and second light reception signals； and an oxygen circulation period calculation part 32 calculating a period since the first period to the second period as an oxygen circulation period, based on identification results of the respiration restart period identification part 41 and the oxygen saturation degree recovery period identification part 31.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】呼吸を直接検出することなく被測定者の酸素循環時間を測定することができる。【解決手段】生体情報測定装置１０は、被測定者の測定部位を透過した第１の波長の光及び第２の波長の光を受光し、第１の波長の光に対応した第１の受光信号および第２の波長の光に対応した第２の受光信号を出力する光電センサ１１と、第１の受光信号の振幅の変動に基づき、被測定者の呼吸が再開された第１の時期を特定する呼吸再開時期特定部４１と、第１の受光信号および第２の受光信号に基づき、測定部位における酸素飽和度が減少から増加に転じる第２の時期を特定する酸素飽和度回復時期特定部３１と、呼吸再開時期特定部４１および酸素飽和度回復時期特定部３１の特定結果に基づき、第１の時期から第２の時期までの時間を酸素循環時間として算出する酸素循環時間算出部３２と、を備える。【選択図】図４
