An ablation treatment device for ablating treatment procedure used with endoscope device is disclosed. The ablation treatment device is inserted through the endoscope device and protruded into the human body, where the equipped neutral electrode and a gas channel for injecting inert gas is protruded. Together with another gas channel formed on the endoscope device, two types of gases are injected into the human body together with application of high frequency currents to perform ablation procedure. The ablation treatment device is controlled through a control circuit that administers control of the injection of the gases and application of high frequency currents.