The present invention relates to a thermometer that can measure the temperature by contacting the food being cooked or placed in water, oil, etc. in the cooking vessel, and more specifically, it is possible to suppress the growth of bacteria on the surface of the thermometer and It relates to a coated thermometer. To this end, the heat-sensitive portion 16 is accommodated in the liquid expansion of the volume according to the temperature; A thermometer (10) integrally formed with the heat sensitive portion (16) and vertically formed with a passage through which the liquid can move; Then, a titanium oxide coated thermometer is provided, which comprises a titanium oxide coating layer 40 coated on the surface of the thermometer 10 to perform sterilization.
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