To provide a biological information detection device capable of improving biological information detection sensitivity while reducing a signal due to noise.SOLUTION: A first sensor part 40 having a first piezo electric element 41 and a second sensor part 50 having a second piezo electric element 51 are arranged on one surface 20a of a substrate 20. The first piezo electric element 41 and the second piezo electric element 51 are arranged in a state in which a first sensor signal and a second sensor signal are of the same polarity when application directions of the applied pressure are the same, and the first sensor signal and the second sensor signal are of the opposite polarities when application directions of the applied pressure are opposite to each other.SELECTED DRAWING: Figure 1【課題】ノイズに起因する信号を低減しつつ、生体情報の検出感度を向上できる生体情報検出装置を提供する。【解決手段】基板２０の一面２０ａに、第１圧電素子４１を有する第１センサ部４０と、第２圧電素子５１を有する第２センサ部５０とを配置する。また、第１圧電素子４１および第２圧電素子５１は、印加される圧力の印加方向が同じである際に第１センサ信号および第２センサ信号が同じ極性となり、印加される圧力の印加方向が反対である際に第１センサ信号および第２センサ信号が反対の極性となる状態で配置する。【選択図】図１
