PROBLEM TO BE SOLVED: To provide an optical biological sensor device and the like which can further reduce power consumption. An optical biological sensor device (1) includes a light emitting unit (140) that emits light toward a living body (2), a light receiving unit (150) that detects light emitted by the light emitting unit (140) and transmitted through the living body (2), and a light receiving unit. Based on the intensity of the light detected by 150, the biological information acquisition unit 170 that acquires the biological information of the living body 2, and based on the intensity of the light detected by the light receiving unit 150, the drive voltage of the light emitting unit 140 is controlled. And a voltage control unit 160. [Selection diagram] Figure 1【課題】より消費電力を抑制することが可能な光学式生体センサ装置等を提供する。【解決手段】光学式生体センサ装置１は、生体２に向けて光を照射する発光部１４０と、発光部１４０により照射され、生体２内を透過した光を検出する受光部１５０と、受光部１５０により検出された光の強度に基づいて、生体２の生体情報を取得する生体情報取得部１７０と、受光部１５０により検出された光の強度に基づいて、発光部１４０の駆動電圧を制御する電圧制御部１６０と、を備える。【選択図】図１
