The present invention relates to an electrode unit for a high frequency treatment device. The present invention provides an electrode unit for a high frequency treatment device, wherein: the electrode unit has a base pad of which shape and bending modification state can be freely modified since the base pad to be contacted to the body is formed by a silicone material and a number of electrode plates are connected to the base pad, so that the base pad can be accurately and tightly contacted to various body portions having a curved shape, and therefore the electrode unit can be used in a more safe and convenient manner generation of a gap between the base pad and the electrode plate during bending modification of the base pad by providing a separate electrode supporting plate capable of supporting the electrode plate between the base pads of a silicone material, so that a connecting structure of the electrode plate can be stably maintained, and a breakdown caused by introduction of foreign substances can be prevented and feeling of irritation such as cold feeling during contact of the electrode plate to the body surface can be reduced, and damages such as scratch on the body surface caused by the electrode plate can be prevented, and also spark phenomenon generated by reasons such as breakaway of the electrode plate from the body surface can be prevented by forming each of numerous electrode plates with a electrode terminal plate of a metal substance and a insulation coating layer coated on the outside of the plate, so that use safety can be more improved. The present invention relates to an electrode unit for a high frequency treatment device, wherein the electrode unit comprises: a base pad having band hanging units formed on both ends thereof so that a separate fixing band can be coupled therewith and multiple electrode plates coupled with one side surface of the base pad to be separated from each other and provided with a standard power source or a high frequency
