An ultrasonic operating apparatus includes an ultrasonic transducer which generates ultrasonic vibration, a probe unit which is coupled to the ultrasonic transducer and transmits the ultrasonic vibration from the ultrasonic transducer, an ultrasonic transducer unit having a casing section which contains the ultrasonic transducer, an electric cable which is provided at a proximal end portion of the ultrasonic transducer unit, a handle unit in which the probe unit is inserted and which includes a coupling end portion for coupling to a distal end portion of the ultrasonic transducer unit, and a coupling section which couples an outer periphery of the distal end portion of the ultrasonic transducer unit and a proximal end portion of the handle unit, wherein the coupling section includes a different-type assembly prevention section which prevents assembly between the ultrasonic transducer unit and the handle unit which are different types.