PROBLEM TO BE SOLVED: To provide a technology to switch a measurement condition during measurement.SOLUTION: A measurement device includes: a spectral sensor including spectral means for dispersing a reflection light from a living body at a measurement position or a transmission light that has transmitted the living body at the measurement position according to the wavelength, and light reception means that includes a plurality of pixels, each of the plurality of pixels receiving a light including a predetermined wavelength dispersed by the spectral means； generation means for generating a biological signal from a light reception result of a predetermined pixel of the light reception means； first determination means for determining a cycle of the biological signal； detection means for detecting a feature amount of the biological signal； setting means for setting a living body measurement condition to the spectral sensor； second determination means for determining whether or not the measurement condition needs to be changed on the basis of the biological signal； and third determination means for, when it is determined that a change in the measurement condition is needed in a first cycle of the biological signal, determining whether or not a change in the measurement condition is possible in a period from the detection of the feature amount by the detection means in the first cycle to a time point when the first cycle ends.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】測定中に測定条件を切り替えるための技術を提供する。【解決手段】測定装置は、測定位置にある生体からの反射光、又は、測定位置にある生体を透過した透過光を波長に応じて分光する分光手段と、複数の画素を有し、複数の画素の各画素は、分光手段が分光した所定の波長を含む光を受光する受光手段と、を含む分光センサと、受光手段の所定画素の受光結果から生体信号を生成する生成手段と、生体信号の周期を判定する第１判定手段と、生体信号の特徴量を検出する検出手段と、生体の測定条件を分光センサに設定する設定手段と、生体信号に基づき測定条件の変更が必要か否かを判定する第２判定手段と、生体信号の第１周期において測定条件の変更が必要であると判定すると、第１周期において検出手段が特徴量を検出してから第１周期の終了時刻までの期間内で測定条件の変更が可能であるかを判定する第３判定手段と、を備えている。【選択図】図１
