PROBLEM TO BE SOLVED: To provide a biological information measurement apparatus and a biological information measurement program capable of more accurately measuring changes of blood oxygen concentration as compared when changes of amplitude ratios (extinction ratios) of signals respectively representing changes of light amounts of a plurality of light beams detected from a living body are detected as changes of blood oxygen concentration.SOLUTION: A biological information measurement apparatus 10 comprises: a correction unit 31 that receives a first signal representing changes of amount of light with a first wavelength detected from a living body and a second signal representing changes of amount of light with a second wavelength detected from the living body, and that corrects at least one of the first signal and the second signal such that the difference between the change amount of the first signal and the change amount of the second signal becomes smaller as the arterial blood amount of the living body changes； and a calculation unit 32 that calculates a change of the blood oxygen concentration in the living body on the basis of the first signal and the second signal, at least one of which is corrected by the correction unit 31.SELECTED DRAWING: Figure 16COPYRIGHT: (C)2020,JPO&INPIT【課題】生体から検出される複数の光の光量変化の各々を表す信号の振幅比（減光度比）の変化を血中酸素濃度の変化として検出する場合と比較して、血中酸素濃度の変化を精度良く測定することができる生体情報測定装置、及び生体情報測定プログラムを提供する。【解決手段】生体情報測定装置１０は、生体から検出される第１の波長の光の光量変化を表す第１の信号と、生体から検出される第２の波長の光の光量変化を表す第２の信号とを受け付け、生体の動脈血液量の変化に伴う、第１の信号の変化量と第２の信号の変化量との差が小さくなるように、第１の信号及び第２の信号の少なくとも一方を補正する補正部３１と、補正部３１により少なくとも一方が補正された第１の信号及び第２の信号に基づいて、生体における血中酸素濃度の変化を算出する算出部３２と、を備える。【選択図】図１６
