Disclosed herein is an electrosurgical probe which is applicable to a patient's joints at knees, shoulders, hands and a spine and other parts requiring surgical operations, capable of being conveniently disposed at any diseased parts to be cured according to an operator's intention, and also capable of maximizing an effect of the operation. The electrosurgical probe includes a connection unit connected with a controller and a high-frequency generator, a shaft fixed to the connection unit, a head unit pivotably connected to the shaft, a high-frequency generation unit disposed at the head unit to generate high-frequency waves, and a head angle varying unit varying an angle of the head unit with respect to the shaft.