This high-frequency treatment tool is provided with the following: a treatment part provided at the tip of an insertion part; and a manipulation part coupled to said insertion part. The treatment part has the following: a cover member attached to the tip of the insertion part; a first treatment member, through which a high-frequency current can be run, that is supported by the cover member and designed so as to rotate about an axis of rotation; and a second treatment member that is supported by the cover member and rotates about an axis of rotation. Said second treatment member has a rod-shaped main body and an insulating tip. The manipulation part has the following: a first drive shaft that is connected to the first treatment member via a first transmission member, and by being driven rotationally, makes the first treatment member rotate; and a second drive shaft that is connected to the second treatment member via a second transmission member, and by being driven rotationally, makes the second treatment member rotate.L'invention concerne un outil de traitement à haute fréquence, qui comprend les éléments suivants : une partie de traitement disposée à la pointe d'une partie d'introduction; et une partie de manipulation couplée à ladite partie d'introduction. La partie de traitement comprend les éléments suivants : un élément de couvercle fixé à la pointe de la partie d'introduction; un premier élément de traitement, à travers lequel peut passer un courant à haute fréquence, qui est porté par l'élément de couvercle et conçu de façon à tourner autour d'un axe de rotation; et un second élément de traitement qui est supporté par l'élément de couvercle et tourne autour d'un axe de rotation. Ledit second élément de traitement a un corps principal en forme de tige et une pointe isolante. La partie de manipulation comprend les éléments suivants : un premier arbre d'entraînement qui est relié au premier élément de traitement par l'intermédiaire d'un premier élément de trans