The invention relates to a nipple thermometer. The nipple thermometer comprises a nipple body, a tray, an electronic circuit water shield, a nipple rack, a processor, a display window, a liquid crystal display, an LED lamp, a temperature sensor, a power source, a switch, a handle and a sucking head, wherein the nipple body and the tray are arranged on the nipple rack, the electronic circuit water shield is arranged in the nipple rack, the display window is arranged at the lower part of the electronic circuit water shield, the liquid crystal display and the LED lamp are arranged right above the display window, the liquid crystal display and the LED lamp are both connected with the processor, the processor is connected with a battery, the switch is arranged at the bottom of the electronic circuit water shield and is connected with the processor, and the temperature sensor is arranged between the top of the nipple body and the processor and is connected with the sucking head. The on / off of the LED lamp is used for reminding parents of normal / abnormal body temperature of an infant, the parents can know the health condition of the infant in time, so as to avoid any delay of illness. The nipple thermometer is simple in structure, convenient to use and wide in application range.