An electrostatically atomizing unit for use in a temperature regulating appliance to add a function of generating a mist of charged minute water particles for deodorization and/or sterilization of a temperature-regulated space. The appliance has a cold space of which air is cooled by cooling means and is fed to cool the temperature-regulated space divided from the cold space by a partition. The atomizing unit has an emitter electrode which is configured to condense water from within a surrounding air. A high voltage source applies a high voltage to the emitter electrode to atomize the condensed water into the charged minute water particles which are discharged from the emitter electrode into the temperature-regulated space. The emitter electrode is provided with a cooling coupler which establishes a heat transfer relation through the partition to the cold space to cool the emitter electrode by making the use of the cooling means inherent to the appliance.