Die Erfindung betrifft ein Koagulationsinstrument mit zwei Koagulationselektroden, welche jeweils eine Arbeitsfläche zur Koagulation aufweisen, wobei die Koagulationselektroden einen Wärmeleitkanal aufweisen.Coagulating electrodes (20) have a heat-conducting channel (30). Filled with silver and added to form the heat-conducting channel in the core of the coagulating electrodes, a recess (32) extends through a working surface (25) and a shank (27) on a coagulating electrode. The capacity of the recess in the shank is about one multiple higher than the capacity of the recess in the working surface.