Tongue depressor

The invention discloses a tongue depressor in the field of medical equipment. The tongue depressor comprises a handle, an illuminant is connected to one end of the handle, the illuminant comprises a hollow battery tube, a battery jar is arranged inside the battery tube, a battery is arranged inside the battery jar, a bulb and a transparent protective shell are arranged at the end, away from the handle, of the battery tube, the bulb is sleeved with the protective shell, the bulb is connected with the battery, a switch controlling power-on is arranged on the battery tube. A doctor holds the handle, the bulb and the battery are connected through the switch, the bulb emits light, the battery tube stretches into an oral cavity of a patient, and the protective shell presses the root of the tongue; in this way, due to the fact that the bulb is located inside the protective shell, and the protective shell is transparent, light emitted by the bulb can penetrate through the protective shell to be irradiated into the or