This Hair bright purpose Ti Gong mono- Seed dental Shou Machine that have been As, can Xia Ti Noboru stock-removing efficiencies , ?ask powder Spray outflows Steady determining , And Ti Noboru powder persistence. Along the Inner circumferential surfaces of recess portion (21), (21a) Come Let are set this Hair bright bis- Right Zui Body (37) of dental Shou Machine Department Will, in order to the blowout hole (37a) of the front ends From, by From Kong Inter Zui Body (37) Let set Side towards opposite Side and along the Inner circumferential surfaces of Kong Inter in a manner of blow out empty Gas, the thereby Fen Mo Fly dances of the receiving what recess portion (21) of Shi Kong Inter Inner, and the mixing Like states of the empty Gas of Let Qi With Kong Inter Inner are good. Furthermore under the Like states more than the powder Liang More of receiving what recess portion (21) Inner, the empty Gas of the blowout hole blowout in Yu Zui Body (37) faces Side, the Fen Mo Fly dances near the surface of the powder of Let Dui Plot whats recess portion (21) Inner are formed by From. Again under the few Like states of the Disabled amounts Change of the powder of recess portion (21) Inner, the empty Gas of the blowout hole blowout in the faces Side of Yu Zui Body (37), bottom (21c) the Let Fen Mo Fly dances of From recess portions (21) Inner are formed by From.本發明的目的是為了提供一種牙科用手機,可在提昇切削效率下,謀求粉末的噴出流量的穩定化,並提昇粉末的持久性。本發明的牙科用手機,係將二根一對的嘴體(37)沿著凹部(21)的內周面(21a)來設置,俾從前端部的吹出孔(37a),以從空間之嘴體(37)設置側朝相反側且沿著空間的內周面的方式吹出空氣,藉此使空間內之收容於凹部(21)的粉末飛舞,而讓其與空間內的空氣的混合狀態良好。再者,在收容於凹部(21)內的粉末量較多的狀態下,藉由從形成於嘴體(37)側面的吹出孔吹出的空氣,讓堆積於凹部(21)內的粉末的表面附近的粉末飛舞。又在凹部(21)內的粉末的殘量變少的狀態下,藉由從形成於嘴體(37)的側面的吹出孔吹出的空氣,從凹部(21)內的底部(21c)讓粉末飛舞。