PROBLEM TO BE SOLVED: To provide a subcutaneous diagnostic system properly available for a blood pressure measuring method of a new principle.SOLUTION: A diagnostic system comprises a probe 3 including: a vibrator capable of sending and receiving an ultrasonic signal through a contact face 3a made to contact with a body surface 101 and a pressure sensor 15 capable of detecting the pressure which is received from the body surface 101 by the contact face 3a.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】新たな原理の血圧測定方法に好適に利用可能な皮下診断装置を提供する。【解決手段】診断装置は、体表面101に接触される接触面3aを介して超音波信号を送受信可能な振動子、及び、体表面101から接触面3aが受ける圧力を検出可能な圧力センサ15を含むプローブ3を有している。【選択図】図3