A high-frequency treatment instrument (51) of the present invention includes: a pair of forceps members (a first forceps member (61) and a second forceps member (62)) that includes a conductive electrode portion (63) and an insulating portion (64) and is supported by the forceps rotation shaft (65) so as to be relatively rotatable； an operation section configured to open and close the pair of forceps members； an operation wire that connects the pair of forceps members to the operation section； and a regulation wire (71) that has a first end portion rotatably connected to the forceps rotation shaft (65) and a second end portion connected to a power supply and is electrically connected to the electrode portion (63). According to the invention, a high-frequency treatment instrument with a power feeding structure capable of easily concentrating energy can be provided.
