A multifunction device for endoscopic surgery including a supply means for the supply of at least one fluid and forceps or a clamp which comprise forceps-shaped electrodes with jaw parts for high-frequency surgery. The supply means is formed to dissect tissue by means of a fluid jet at or in a jaw part of the forceps or clamp. The multifunction device is one for both water jet surgery and high-frequency coagulation and/or cutting that occupies no more space than a conventional high-frequency instrument or conventional forceps or clamps.
