The optical measurement equipment which can obtain the measurement data where it is not necessary for no time to make the topic accomplishment state such that it can point to the motion of the finger to the suffering inspection body is not the dispersion which makes the influence of Mayer decrease Wave and the like which originates in the breath and the blood pressure etc other than topic accomplishing, has reproducibility is offered. The organism monitor control section 32 which obtains organism information from the organism monitor 60 where the sending light absorbent section control section it has with the arithmetic logical unit 31 where, calculates the change quantity of 4 which obtains the receiving light intensity information regarding the measurement region of the brain of the suffering inspection body and hemoglobin density the case where the task period which continues to apply load to the suffering inspection body is executed the optical measurement equipment 1 which obtains the measurement data which shows the time-dependant change of the change quantity of hemoglobin density, is arranged on the skin surface of the suffering inspection body, heart beat of the suffering inspection body, detects the organism information regarding the blood pressure or breath and organism monitor 60With, on the basis of organism information, it features that it has the task period start time decisive section 35 which decides the start time of task period.被検体に指の運動をさせる等の課題遂行状態に何回も行わせる必要がなく、課題遂行以外の呼吸や血圧等に起因するMayer Wave等の影響を低減させたバラツキのない、再現性のある測定データを得ることができる光測定装置を提供する。被検体の脳の測定部位に関する受光量情報を得る送受光部制御部4と、ヘモグロビン濃度の変化量を算出する演算部31とを備え、被検体に負荷をかけ続けるタスク期間が実行されている際のヘモグロビン濃度の変化量の経時変化を示す測定データを得る光測定装置1であって、被検体の皮膚表面上に配置され、被検体の心拍、血圧又は呼吸に関する生体情報を検出する生体モニタ60と、生体モニタ60から生体情報を得る生体モニタ制御部32と、生体情報に基づいて、タスク期間の開始時間を決定するタスク期間開始時間決定部35とを備えることを特徴とする。
