The invention provides a warning device for dental patients, including a switch that blocks the power of at least one dental machine at the power source end of the dental machine, a control unit is connected to the switch, a display and a sensor are separate connected to the control unit. Th erein, the sensor may touches to the patient's body the patient can release a warning instruction from the sensor, the control unit orders the display to reveal a physiological index of the patient according to the warning instruction, and the control unit can order the switch to control or block the power of the dental machine according to the physiological index, so that improving the matters of the lack of specific warning technology in the traditional dentist's diagnosis and treatment process.本發明提供一種牙科病患專用的警示裝置，包括在牙醫診療用之至少一器械的動力源端加設一可阻斷器械動力的切換開關，使該該切換開關連接一控制單元，該控制單元還連接有一顯示器及一傳感器，該傳感器能接觸病患的身體；其中，病患能經由傳感器下達一警示指令，令控制單元依據該警示指令而命令該顯示器對外揭示病患的一生理指數，且該控制單元能依據該生理指數而命令該切換開關管制或阻斷所述器械的動力，據以改善傳統牙醫診療過程中欠缺專供病患專用的警示技術。
