PROBLEM TO BE SOLVED: To achieve a reduction in size of a biological information measurement device measuring pulse wave velocity.SOLUTION: A biological information measurement device 1 comprises: an irradiation section irradiating light or a sound wave as a measurement wave onto a living body； a detection section detecting the measurement wave passing through the living body； and an operation section 420 evaluating a time change of a blood flow rate and a time change of a blood vessel cross section area on the basis of a detection result of the detection section, and evaluating a pulse wave propagation speed from the time change of the blood flow rate and the time change of the blood vessel cross section area.SELECTED DRAWING: Figure 4【課題】脈波伝播速度を測定する生体情報測定装置の小型化を図る。【解決手段】生体情報測定装置１は、測定波として光または音波を生体に照射する照射部と、生体内を通過した測定波を検出する検出部と、検出部の検出結果に基づいて、血流量の時間変化と血管断面積の時間変化とを求め、血流量の時間変化および血管断面積の時間変化から脈波伝搬速度を求める演算部４２０とを備える。【選択図】図４
