PROBLEM TO BE SOLVED: To provide an oral hygiene device capable of effectively removing dental plaque which is a nest of anaerobic bacteria. SOLUTION: A toothbrush device 1 is composed of a toothbrush main body 3 and an oxygen cylinder 5 (oxygen supply source) for supplying oxygen to the toothbrush main body 3, and the toothbrush main body 3 is composed of a grip portion 7 and the grip portion 7. It is composed of a head portion 11 provided at the tip of the grip portion 7 via the neck portion 9 and a bundle of brushes 15 provided on the head portion 11. The oxygen cylinder 5 is connected to the rear end portion of the grip portion 7 via the oxygen supply tube 17 and the connector 19. [Selection diagram] Fig. 1【課題】嫌気性細菌の巣である歯垢を効果的に除去できる口腔衛生器具を提供する。【解決手段】歯ブラシ器１を、歯ブラシ本体３と、この歯ブラシ本体３に酸素を供給するための酸素ボンベ５（酸素供給源）と、から構成し、歯ブラシ本体３を、把持部７と、この把持部７の先端に頚部９を介して設けた頭部１１と、この頭部１１に設けた刷毛の束１５と、から構成する。酸素ボンベ５を、酸素供給チューブ１７及びコネクタ１９を介して把持部７の後端部に接続する。【選択図】図１
