The present invention relates to an electrode device for radiofrequency ablation, which can easily be used for computed tomography (CT)-guided radiofrequency ablation (RFA) treatment. An embodiment of the present invention provides an electrode device for radiofrequency ablation, which comprises an electrode needle provided in front of a grip and is configured to cauterize and necrotize a diseased site by radiofrequency heat generated from the electrode needle, the electrode device comprising a bendable tube which is provided between the grip and the electrode needle, is bendable at a predetermined angle, and is capable of being maintained in a bent state.
