A surgery system includes: an ultrasonic output device for outputting to an ultrasonic transducer provided in a treatment instrument for performing surgery an ultrasonic drive signal to ultrasonically vibrate the ultrasonic transducer； a high-frequency output device for outputting a high-frequency signal for high-frequency ablation to the treatment instrument； and a connector section including a first connector and a second connector provided to the ultrasonic output device and the high-frequency output device, respectively, the connector section transmitting an output of the ultrasonic drive signal or the high-frequency signal from one of the devices to the other of the devices by connecting both of the connectors.
