The arrangement surface formed by the inner surface of the sphere and the arrangement surface so that the focal point of the emitted ultrasonic wave is in the vicinity of the outside of the outer surface of the subject and at a predetermined distance (A) from the outer surface. A plurality of ultrasonic transducers (10) arranged above and a control unit that controls transmission / reception of each ultrasonic transducer (10), and the control unit is provided in a diagnostic region inside the subject (M) A diagnostic mode in which at least one ultrasonic transducer (10) is oscillated and a reflected wave from the diagnostic region is received and visualized by at least one ultrasonic transducer (10)； ) Has a treatment mode for oscillating at least one ultrasonic transducer (10).球体の内表面によって形成される配置面と、出射される超音波の焦点が被検体の外表面の外側近傍でかつ外表面から所定距離（Ａ）だけ離れた位置となるように、前記配置面上に配列された複数の超音波振動子（１０）と、各超音波振動子（１０）の送受信を制御する制御部とを備え、制御部は、被検体（Ｍ）の内部の診断領域に向けて少なくとも１つの超音波振動子（１０）を発振させるとともに、診断領域からの反射波を少なくとも１つの超音波振動子（１０）にて受波して可視化する診断モードと、被検体（Ｍ）の内部に向けて少なくとも１つの超音波振動子（１０）を発振させる治療モードを有している。
