To provide an electrostatic atomizer in which the water supplied from a water supply part can be guided quickly and surely to a tip atomization part of a water application electrode, from which plenty of electrostatic mists can be obtained stably and which can be installed in a small space having narrow width in the depth direction.

The water supply part of the electrostatic atomizer for producing electrostatic mists includes: a peltier unit 6; a heat radiation part 7 coming into contact with the heat radiation surface of the peltier unit; a cooling part which comes into contact with the cooling surface positioned on the opposite side of the heat radiation surface and is used for producing condensed water being the water to be supplied to the water application electrode; and a resin-made cooling part holding frame 63 for fixing the cooling part to the heat radiation part 7. The heat radiation part 7 has a heat radiation exposure part 7a exposed from the peltier unit 6 on the surface coming into contact with the heat radiation surface of the peltier unit 6. The cooling part holding frame 63 covers the heat radiation exposure part 7a, which is positioned on the upstream side of the cooling part, against an air current passing through the cooling part.

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