PROBLEM TO BE SOLVED: To adjust tomographic images at a plurality of angle positions in the middle of a long axis image and a short axis image relatively accurately by a simple operation.SOLUTION: The shape of the cross section 23a of the grip portion 23 of the ultrasonic probe 3 is formed into a polygon having six or more corners, and by rotating the ultrasonic probe 3 for one or more corners (pitches) around an axis, adjustment is relatively accurately executed by the simple operation and imaging is executed.COPYRIGHT: (C)2010,JPO&INPIT【課題】長軸像と短軸像との中間の複数の角度位置に置ける断層像を比較的精度よく、簡単な操作で調整可能にする。【解決手段】超音波探触子3の握り部23の断面23aの形状を6角形以上の多角形に形成し、超音波探触子3を軸回りに1又は複数角(ピッチ)数、回転することにより、簡単な操作で、比較的精度よく調整して撮像する。【選択図】 図1