A thermocoagulation/cutting device 11 includes an exothermic part 13 made of a meta a first current supply portion 41 projecting integrally from the exothermic part 13 a second current supply portion 42 projecting integrally from the exothermic part 13 and a third current supply portion 43 projecting integrally from the exothermic part 13. The thermocoagulation/cutting device 11 includes a controller 16. The controller 16 is capable of causing an electric current to flow between the first current supply portion 41 and second current supply portion 42, between the first current supply portion 41 and third current supply portion 43, or between the second current supply portion 42 and third current supply portion 43.
