Abstract: For pulling an areal flexible electrode (4) between the inside surface of a plaster cast (2) and a member (1) of the body encased in a plaster cast (2), the plaster cast (2) is provided with at least one small hole (10) through which a draw wire is slid into the interior of the plaster cast (2) up to its front side opening (9). Thereupon the end of the draw wire is fastened on the electrode (4) so that said electrode can be pulled into the plaster cast (2) to a specified body spot by means of the draw wire. In order to achieve intimate contact of the surface of the electrode (4) with the body spot, the electrode (4) is provided on the opposite side with an elastic padding (6) which is supported on the inside surface of the plaster cast (2) in the draw-in position of the electrode (4). In a simple manner, the areal electrode (2) can thereby be put several times on the body spot covered by the plaster cast without the necessity of changing the plaster cast in a manner disadvantageous of the member of the body.