PROBLEM TO BE SOLVED: To calculate an index related to a blood vessel of a living body with high accuracy while reducing a physical burden of a subject.SOLUTION: A living body analysis device comprises a blood vessel calculation section calculating a blood vessel index related to a blood vessel of a living body according to a blood volume integrated value obtained by integrating a blood volume index related to a blood volume of the living body for an integration period and a blood flow rate integrated value obtained by integrating a blood flow rate index related to a blood flow rate of the living body for the integration period.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2020,JPO&INPIT【課題】被験者の身体的な負荷を軽減しながら、生体の血管に関する指標を高精度に算定する。【解決手段】生体の血液量に関する血液量指標を積算期間について積算した血液量積算値と、前記生体の血流量に関する血流量指標を前記積算期間について積算した血流量積算値とに応じて、前記生体の血管に関する血管指標を算定する血管算定部を具備する生体解析装置。【選択図】図3