Provided is a biological information measuring device capable of reducing stray light in detection light reaching a light receiving portion from a light emitting portion and improving an SN ratio in a photoelectric pulse wave signal. A biological information acquiring apparatus (1) includes a light emitting unit (20) for irradiating a finger (F) of a subject and a photoelectric pulse wave signal by receiving and photoelectrically converting transmitted light or reflected light from the finger (F) A light receiving section (30), and a processing section (40) for acquiring biological information based on the photoelectric pulse wave signal, wherein the irradiation direction of the light emitting section (20) or the direction perpendicular to the light receiving direction of the light receiving section (30) The light emitting portion 20 and the light receiving portion 30 are arranged such that a line passing through the center of the light emitting portion 20 and the center of the light receiving portion 30 is inclined with respect to the longitudinal direction of the finger F in plan view .発光部から受光部に到達する検出光における迷光を低減して、光電脈波信号におけるSN比を向上することを可能とする生体情報計測装置を提供する。 生体情報取得装置(1)は、被験者の指(F)を照射する発光部(20)と、指(F)からの透過光又は反射光を受光及び光電変換して光電脈波信号を出力する受光部(30)と、光電脈波信号に基づいて生体情報を取得する処理部(40)とを備え、発光部(20)の照射方向又は受光部(30)の受光方向に垂直な面における平面視において、発光部(20)の中心と受光部(30)の中心を通る線が指(F)の長手方向に対して傾斜するように発光部(20)及び受光部(30)が配置される。
