A surgical apparatus 1 includes a treatment section 31 for treating a living tissue, a high-frequency output section 44 for providing high-frequency current to the treatment section 31, a liquid feeding tube 25 for feeding a liquid, a suction tube 26 for suctioning the liquid, a first pump 47 for supplying the liquid into the liquid feeding tube 25 so as to feed the liquid from a liquid feeding port provided at the treatment section 31, a second pump 49 for suctioning the liquid from a suction port provided at the treatment section 31 through the suction tube 26, and a CPU 41. The CPU 41 controls the second pump 49 to perform suction of the liquid for a predetermined period of time in connection with stoppage of an output of the high-frequency current from the high-frequency output section 44 after the stoppage of the output of the high-frequency current.
