PROBLEM TO BE SOLVED: To suppress fluctuations in an irradiation amount of light irradiated onto a driver.SOLUTION: A pulse wave measuring device includes: a light emitting part 107A for irradiating an area at least including a skin of a user in a vehicle with light； an imaging part 104A for acquiring an image taken of the area including the skin of the user； a control part 109A for (A) acquiring a travelling route of the vehicle from a place of departure to a destination, (B) acquiring estimated time when the vehicle passes through a position on the travelling route, and estimating an incident amount of sunlight made incident into the vehicle located at the position at the estimated time, and (C) calculating an emission amount of the light emitting part 107A so that a total of the estimated incident amount of sunlight and the emission amount of the light emitting part 107A becomes a constant value, and controlling emission of the light emitting part 107A at the position； and a pulse wave calculation part 105A for calculating a pulse wave of the user using the image, and outputting pulse wave information of the user.SELECTED DRAWING: Figure 26【課題】運転者に照射される光の照射量の変動を抑制する。【解決手段】車両内のユーザの少なくとも肌を含む領域に光を照射する発光部１０７Ａと、ユーザの肌を含む領域が撮像された画像を取得する撮像部１０４Ａと、（Ａ）車両の出発地から目的地までの走行経路を取得し、（Ｂ）車両が走行経路上の位置を通過する予想時刻を取得し、予想時刻に上記位置に位置する車両内に入射する太陽光の入射量を予測し、（Ｃ）予測した太陽光の入射量と発光部１０７Ａの発光量との合計が一定値になるように発光部１０７Ａの発光量を算出し、上記位置における発光部１０７Ａの発光を制御する制御部１０９Ａと、上記画像を用いてユーザの脈波を算出し、ユーザの脈波情報を出力する脈波算出部１０５Ａとを備える。【選択図】図２６
