An energy treatment device includes: a base having electrical conductivity and including a treatment surface for applying a high-frequency current to a treatment target when being supplied with electrical energy. A coating, including a silane coupling agent having a coupling structure, is formed over at least the treatment surface of the base by a bond due to the coupling structure； and an organic layer is disposed between the treatment surface of the base and the coating, and is bonded to the surface of the base. The coupling structure of the coupling agent of the coating is bonded to the organic layer.
