A tooth whitening device is disclosed. A tooth whitening apparatus according to the present invention includes a body having an opening that is inserted into an oral cavity and is in close contact with a tooth and a switch that is connected to an opening device and a cable and that supplies power to turn on / A tooth whitening device including a body having a flat and rectangular shape, the opening device being formed in a curved shape and having an accommodating space formed therein and having an opening formed on one side thereof a body accommodating body A light emitting unit having a PCB in which a plurality of light emitting elements are mounted in a space, a binding member detachably attached to the outer peripheral edge of the opening of the body and having a vent hole at the center, a binding member And an oral cavity wearing part which is formed on one side of the insertion part and is inserted into the mouth and is made of an insertion member which is in contact with the teeth, is formed so as to protrude from the inner side face of the insertion member and to be caught with teeth A gripping member and a ventilation slot are formed at a part of the insertion member so as to be bored long and breathable.BACKGROUND OF THE INVENTION歯のホワイトニング装置が開示される。本発明に係る歯のホワイトニング装置は、口腔に挿入されて歯に密着する開口器と、開口器とケーブルに連結されて電源を供給してオン/オフを制御するスイッチが形成された本体と、を含む歯のホワイトニング装置において、開口器は、平たくかつ長方形の形状であるが、湾曲して形成されて内部に収容空間が形成され、一側に開口部が形成されたボディーと、ボディーの収容空間に設置されて多数の発光素子が植え付けられたPCBを有する発光部と、ボディーの開口部の外周縁に脱着されるように結合されて中央に通気孔を有する結着部材と、結着部材の一側に形成されて口の中に挿入されて歯に接触する挿入部材で構成される口腔着用部と、を含んで、挿入部材の内側面に突設されて歯で噛めるように形成された挟持部材と、挿入部材の一部位には長く穿孔されて通気性を有するように通気長孔が形成されてなる。【選択図】図1