A high-frequency treatment instrument of the present invention includes: a pair of forceps members that includes a conductive electrode portion and an insulating portion and is supported by the forceps rotation shaft so as to be relatively rotatable； an operation section configured to open and close the pair of forceps members； a link mechanism that is attached to the pair of forceps members and includes a pair of link members； an operation wire that connects the link mechanism to the operation section； a rotation contact member that is rotatably connected to the pair of forceps members； and a regulation wire in which one end thereof is electrically connected to the rotation contact member, a part of an intermediate portion thereof is disposed so as to pass through a space between the respective link members, and the other end thereof is electrically connected to a power supply.
