Abstract: The invention herein relates to a kind of safety pin with an attached multi-function thermometer which consists mainly of a temperature display and pulse tone emitting integrated circuit board. The enclosure of the aforesaid integrated circuit board can be fabricated in the shape of various animals or cartoon characters. A safety pin is mounted on the rear side of the enclosure for fastening the device onto the clothing of an infant. Extending from the integrated circuit board is a coiled conductor connected to a threaded seat that is fastened in screw-on fashion to a heat sensor rod contained in a pacifier nipple. As an infant sucks the pacifier nipple, the oral temperature of the infant is measured by the heat sensor rod and the temperature reading is shown via a liquid crystal display on the integrated circuit board. The integrated circuit board also has specially designed temperature setting functions.