PROBLEM TO BE SOLVED: To accurately specify a degree of oxygen saturation even when a state of a measurement object changes.SOLUTION: A measurement device includes a first light emission unit for emitting a light of a first wavelength to a measurement region, a second light emission unit for emitting a light of a second wavelength different from the first wavelength to the measurement region, a light reception unit for receiving the light passing through the inside of the measurement region, and generating a detection signal, and an analysis processing unit for calculating a degree of oxygen saturation from the detection signal. The distance between each light emission position of the first light emission unit and the second light emission unit, and the light reception position of the light reception unit is variable.SELECTED DRAWING: Figure 2【課題】測定対象の状態が変化した場合でも酸素飽和度を高精度に特定する。【解決手段】第１波長の光を測定部位に出射する第１発光部と、前記第１波長とは異なる第２波長の光を前記測定部位に出射する第２発光部と、前記測定部位の内部を通過した光を受光して検出信号を生成する受光部と、前記検出信号から酸素飽和度を算定する解析処理部とを具備し、前記第１発光部および前記第２発光部の各々による発光位置と前記受光部による受光位置との距離は可変である測定装置。【選択図】図２
