Disclosed is a treatment device that can reduce the fatigue of a dentist and maintain concentration by making it possible to easily cut a tooth root canal and to remove a nerve. The vibration side casing 14 is attached to the tip of the handle side casing 10, and the motor 2 having the plate cam 21 attached to the rotary shaft 20 is housed here. A vibration cylinder mounting port 15 is opened at the distal end of the vibration side housing 14, and the vibration cylinder 16 is mounted here. The vibration cylinder 16 is provided so as to vibrate in the front-rear direction while being urged toward the plate cam 21 by a spring 18 with respect to the vibration-side casing 14. The vibrating cylinder 16 is brought into contact with the plate cam 21 with the roller 19 at the rear end. A reamer mounting opening 17 is opened at the tip of the vibrating cylinder 16 so that the insertion portion 30 of the reamer 3 can be received and held tightly. The reamer 3 including the flexible needle portion 31 can be attached to and detached from the vibration side housing 12.歯の根管の切削や神経を抜く作業が容易に行い得るようにすることにより、歯科医師の疲労を少なくして集中力が持続できるような治療用具を提供する。 ハンドル側筐体１０の先に振動側筐体１４を取り付け、ここに回転軸２０に板カム２１が取り付けたモータ２を納める。振動側筐体１４の先端部に振動筒装着口１５を開口し、ここに振動筒１６を装着する。この振動筒１６を振動側筐体１４に対してバネ１８を以て板カム２１の方向に付勢させつつ前後方向に振動可能に設ける。振動筒１６はその後端部のコロ１９を以て板カム２１に接触するようにする。振動筒１６の先にリーマ装着口１７を開口し、リーマ３の挿着部３０を受け入れてきつく保持し得るようにする。この屈曲性を有する針部３１を備えたリーマ３は振動側筐体１２に対して着脱が可能である。
