In order to make the influence decrease with the movement of the suffering inspection body, to be installed in the aforementioned ultrasonic probe in the ultrasonic diagnostic system which has with the reference picture formation expedient which forms the reference picture on the basis of the volume data which is remembered in memory expedient and the aforementioned memory expedient which remember the volume data of the aforementioned suffering inspection body which is acquired by ultrasonic picture formation expedient and the picture image pickup device which form the ultrasonic picture on the basis of the reception signal which is received from the suffering inspection body making use of the ultrasonic probe and the aforementioned ultrasonic probe and the indicatory expedient which indicates the identical section of the aforementioned ultrasonic picture and the aforementioned reference picture, position of the aforementioned ultrasonic probeAnd it is installed in the 1st position sensor, and the aforementioned suffering inspection body which detect direction it has with the 2nd position sensor which detects the position and direction of the aforementioned suffering inspection body, the aforementioned reference picture formation expedient forms the aforementioned reference picture on the basis of the information of position of the aforementioned 1st position sensor and the information of position of the aforementioned 2nd position sensor.被検体の動きによる影響を低減させるため、超音波探触子と、前記超音波探触子を用いて被検体から受信した受信信号に基づいて超音波画像を生成する超音波画像生成手段と、画像撮像装置により取得される前記被検体のボリュームデータを記憶する記憶手段と、前記記憶手段に記憶されたボリュームデータに基づいてリファレンス画像を生成するリファレンス画像生成手段と、前記超音波画像及び前記リファレンス画像の同一断面を表示する表示手段とを備えた超音波診断システムにおいて、前記超音波探触子に取り付けられ、前記超音波探触子の位置及び方向を検出する第1の位置センサと、前記被検体に取り付けられ、前記被検体の位置及び方向を検出する第2の位置センサとを備え、前記リファレンス画像生成手段は、前記第1の位置センサの位置情報及び前記第2の位置センサの位置情報に基づいて前記リファレンス画像を生成する。
