An energy surgical device is provided with a treatment section 101 which treats a subject, an energy supply section 103 which supplies energy to the treatment section 101, a state-change detecting section 102 which detects a state change of the treatment section 101, an energy instruction input section 105 which inputs an instruction for the energy supply, and a regulation section 104 which regulates the energy supply by the energy supply section 103 based on the input of the energy supply instruction through the energy instruction input section 105 and a result of detection in the state-change detecting section 102.
