A surgical operating apparatus includes a sheath having a distal end portion and a proximal end portion, a shaft-shaped probe body which is inserted in the sheath and has a distal end portion and a proximal end portion, and in which ultrasonic vibration is transmitted, a jaw which is rotatably supported on the distal end portion of the sheath and has a first electrode section which is one of bipolar electrodes, a probe distal end portion which is provided at the distal end portion of the probe body, is engaged with the jaw, and constitutes a second electrode section which is the other of the bipolar electrodes, and a driving member including a tubular body section, which is inserted in the sheath slidably in an axial direction of the sheath, and an operating section which is provided on adistal end side of the body section and has a connection section for connection to the jaw, the driving member rotating the jaw by a sliding operation of the body section, wherein the operating section includes a taper portion in which a tubular body of the body section is gradually tapered toward a distal end side.