A resectoscope includes an electrode arrangement having at least one electrode and being connected to a contact at a proximal end region of the electrode arrangement a retaining body mounted on the resectoscope that is movable in the direction of movement of the electrode arrangement and includes an electrode mounting for accommodating the end region of the electrode arrangement and a cable with a plug body for fixing to the retaining body while making contact with the contacts. The retaining body has a plug receptacle for fixing the plug body by an insertion movement aligned at right angles to the direction of movement of the electrode arrangement. In the position which is reached at the end of the insertion movement, the plug body can be turned into an end position where it is blocked by the plug receptacle against a movement in the opposite direction to the insertion movement.
