Abstract: A detachable pacifier with an electronic thermometer includes: a pacifier having a hollow nipple member formed on a guard member and a pair of staple portions disposed on the pacifier; and an electronic thermometer having a pair of fastening buckles detachably coupled to the pair of staple portions on the pacifier and a probe member protruding forwardly from a temperature indicating circuit mounted in the thermometer, the probe member having a plurality of teeth circumferentially formed on a front portion of the probe member, whereby upon insertion of the probe member into the nipple member, the teeth on the probe member will expand; the nipple member resulting in a thinning of a front nipple portion, thus decreasing the thermal resistance of the nipple member for a precise temperature measurement, whereby upon detachment of the pacifier from the electronic thermometer; the pacifier may be dipped in a boiling water bath for sterilization.