PROBLEM TO BE SOLVED: To provide a sensor device capable of measuring a weak pressure fluctuation generated by a measurement target more accurately even when the sensor portion is removed from the measurement target. The present invention is a sensor device that acquires a signal caused by a pressure fluctuation of a measurement target, and is a sheet-shaped polymer piezoelectric element having a predetermined area and a sheet-shaped device attached to both sides of the piezoelectric element. It is a transmission member that has a sensor unit including the electrodes of the above and a contact surface that contacts the measurement target and can transmit the pressure fluctuation of the measurement target. The area of the contact surface is larger than a predetermined area, and the contact surface has a contact surface. The piezoelectric element is provided with a transmission member to which one surface of the piezoelectric element is attached directly or via an electrode, and the piezoelectric element is caused by a pressure fluctuation transmitted from a measurement target in contact with the transmission member to the piezoelectric element via the transmission member. It is a sensor device that acquires a generated voltage signal via an electrode. [Selection diagram] Fig. 1【課題】測定対象からセンサ部分が外れた場合においても、より精度よく測定対象が発生する微弱な圧力変動を測定可能なセンサ装置を提供する。【解決手段】本発明は、測定対象の圧力変動に起因する信号を取得するセンサ装置であって、所定面積を有するシート状の高分子圧電素子及び該圧電素子の両面に各々取り付けられたシート状の電極を含むセンサ部と、測定対象に接触させる接触面を有し、測定対象の圧力変動を伝達可能な伝達部材であって、該接触面の面積は所定面積より大きく、該接触面には直接又は電極を介して圧電素子の一方の面が取り付けられる、伝達部材と、を備え、伝達部材と接触した測定対象から圧電素子へ該伝達部材を介して伝達された圧力変動により該圧電素子が発生する電圧信号を、電極を介して取得する、センサ装置である。【選択図】図１
