A surgical operating apparatus includes rod-shaped probe main body which is inserted into a sheath and has a distal end and which is configured to transmit ultrasonic vibration, a jaw pivoted to a distal end of the sheath, a probe distal end which is provided at the distal end of the probe main body and a driving member including a tubular main body portion configured to be inserted into the sheath slidably along an axial direction of the sheath and an acting portion which is provided at a distal end of the main body portion and has a connection portion connected to the jaw, the connection portion positioned. The sheath includes a notched portion positioned and configured to prevent the sheath from contacting the proximal portion of the jaw.