An electrostatically atomizing device in this invention comprises an emitter electrode, cooling means, and a high voltage source. The emitter electrode has a rode and a discharge head which is formed at one axial end of the rod. The cooling means is coupled in a heat transfer relation to one axial end of the rod away from the discharge head in order to cool the emitter electrode for condensation of water thereon from within a surrounding air. The high voltage source is configured to apply a high voltage to the emitter electrode for electrostatically atomizing the water on the discharge head. The emitter electrode includes a flange which is provided at a juncture between the discharge head and the rod to extend radially outwardly of the discharge head and the rod over an entire circumference of the discharge head. The discharge head is tapered to have an outwardly bulged side contour.