A surgical operating apparatus includes a sheath (18) provided with a distal end part and a proximal end part, an apparatus main body to be coupled to the proximal end part of the sheath (18), a probe (11) which is inserted into the sheath (18), and transmits ultrasonic waves, a probe distal end section (3a) provided at a distal end part of the probe (11), and a jaw (17) pivotally supported at the distal end part of the sheath (18), the jaw (17) being supported so that the jaw (17) can be operated to be opened or closed between a closed position at which the jaw (17) is engaged with the probe distal end section (3a), and an opened position at which the jaw (17) is separated from the probe distal end section (3a), wherein the apparatus main body includes, a handle (49) for operating the opening/closing operation of the jaw (17), a slider section (65) which is moved to be advanced/retreated in an axial direction of a central axis line of the probe (11) in accordance with the operation of the handle (49), a pin (58) which is provided to the handle (49), is engaged with the slider section (65), and transmits the operation of the handle (49) to the slider section (65), and, a frictional force reduction section (821) which is provided to the slider section (65) and/or the pin (58) at a surface at which the slider section (65) and the pin (58) are engaged with each other, and reduces the frictional force acting at the engagement surface at which the slider section (65) and the pin (58) are engaged with each other.
