To more accurately determine that a finger is pressingly held with suitable force.SOLUTION: A pulse wave measurement apparatus according to the present invention comprises: a light-transparent plate which is made of a light-transparent member and against which a finger is pressed； a measurement unit which projects infrared light to the finger through the light-transparent plate and measures a pulse wave； a projection unit which projects green light to the finger through the light-transmission plate, the green light having a peak wavelength in a wavelength range of 490 nm or more and 570 nm or less； a detection unit which receives reflection of projected green light from the finger and detects the intensity of the reflection； and an execution unit which causes the measurement unit to measure a pulse wave if the intensity of the reflection indicates that the force at which the finger is pressed against the light-transparent plate is within a predetermined range suitable for the measurement of the pulse wave.SELECTED DRAWING: Figure 1【課題】適切な力で指が押し当てられていることをより高い精度で判定する。【解決手段】本脈波測定装置は、光を透過する部材で形成され、指が押し当てられる透光板と、前記指に対して前記透光板越しに赤外光を照射して脈波を測定する測定部と、波長４９０ｎｍ以上５７０ｎｍ以下の範囲にピーク波長を有する緑光を前記透光板越しに前記指に照射する照射部と、照射した前記緑光の前記指からの反射光を受光し、前記反射光の強度を検出する検出部と、前記透光板に前記指を押し当てる力が前記脈波の測定に好適な所定範囲内であることを前記反射光の強度が示す場合に、前記測定部に前記脈波の測定を実行させる実行部と、を備える。【選択図】図１
