A flexible electrode (1) for applying an electric field to the human body, comprising: a gripping portion (3) a deformable structure (5) having a first face (5a) fixed to the gripping portion (3) a flexible polymeric film (7) arranged on a flat second face (5b) of the deformable structure (5) and provided, on a flat face (7a) thereof facing outwards the electrode (1), with flat metal structures (10,11) defining at least one first electrode and one second electrode (A,B), surfaces (10a,11a) of the flat metal structures (10,11) facing outwards the polymeric film (7) being coplanar with the flat face (7a) of the polymeric film (7).
