There is provided an electrostatic precipitator capable of suppressing the effect of reducing the dust collection effect in ion wind and increasing the dust collection efficiency. The electrostatic precipitator 1 has a plurality of openings, a dust collecting electrode 4 installed along the gas flow (G) direction, and a discharge electrode 5 disposed in parallel with the dust collecting electrode 4, and the discharge electrode Reference numeral 5 has a plurality of corona discharge sections 8 for corona discharge protruding toward the dust collecting electrode 4 of only one of the dust collecting electrodes 4 facing each other in a gas flow direction. The plurality of dust collecting electrodes 4 and the plurality of discharge electrodes 5 are alternately aligned in a direction orthogonal to the gas flow (G) direction. In each of the upstream region S1 and the downstream region S2 in the gas flow G direction, all of the corona discharge portions 8 protrude toward the same direction.
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