Disclosed is a direction controllable electrode body, comprising a flexible body which comprises: a first electrode, comprising a body, a first cap joined to one end of the body, and a first electrode line connected to the other end of the body； an insulator in partial contact with the body and the first cap of the first electrode, said insulator functioning to insulate the first electrode from the second electrode； a second electrode, comprising a first ring in contact with the insulator, and a second electrode line connected to one end of the first ring； and a direction controller, comprising a first direction controlling wire communicating with the first electrode or the second electrode to control direction of the electrode body. Also, a guide pipe is provided for leading the electrode body to a target tissue.
