Just Tip 16 of operation microscope 15 to change freely with left and right direction X it is possible the observation angle of operating area T by the time making move to left and right direction X with principal axis S as the center. As for observation angle changing, as for direction of eye contacting part 22 for the unchangeability, as for the operator it is not necessary to bend the neck, when the long time interlude technique is done, burden does not join to the neck of the operator.手術顕微鏡15の先端部16だけを主軸Sを中心にして左右方向Xへ回動させることにより、術部Tの観察角度を左右方向Xで自由に変化させることができる。観察角度は変わっても、接眼部22の向きは不変のため、術者は首を曲げる必要がなく、長時間の手術を行う場合も、術者の首に負担が加わらない。
