An electric precipitator comprising: a charge unit disposed at an upstream part in an air flow direction; and a dust collection unit disposed at a downstream part in the air flow direction, wherein: the charge unit includes a plurality of charge electrodes separated from each other, and a discharge wire disposed between two neighboring charge electrodes and separated from the charge electrodes; the dust collection unit includes a plurality of high voltage electrodes, front ends of which are opposite to the charge unit and which are separated from each other, and a plurality of low voltage electrodes, front ends of which are opposite to the charge unit and which alternate with the plurality of high voltage electrodes; and the front ends of the plurality of high voltage electrodes protrude toward the charge unit as compared to the front ends of the plurality of low voltage electrodes; characterized by an insulating member disposed between the high voltage electrode and the discharge wire, wherein the insulating member is disposed at a high voltage electrode located in a straight line with the discharge wire in the air flow direction from among the plurality of high voltage electrodes, wherein the insulating member is formed in a bar type extended in parallel with the discharge wire. a charge unit disposed at an upstream part in an air flow direction; and a dust collection unit disposed at a downstream part in the air flow direction, wherein: the charge unit includes a plurality of charge electrodes separated from each other, and a discharge wire disposed between two neighboring charge electrodes and separated from the charge electrodes; the dust collection unit includes a plurality of high voltage electrodes, front ends of which are opposite to the charge unit and which are separated from each other, and a plurality of low voltage electrodes, front ends of which are opposite to the charge unit and which alternate with the plurality of high voltage electrodes; and the front ends of the plurality of high voltage electrodes protrude toward the charge unit as compared to the front ends of the plurality of low voltage electrodes; the charge unit includes a plurality of charge electrodes separated from each other, and a discharge wire disposed between two neighboring charge electrodes and separated from the charge electrodes; the dust collection unit includes a plurality of high voltage electrodes, front ends of which are opposite to the charge unit and which are separated from each other, and a plurality of low voltage electrodes, front ends of which are opposite to the charge unit and which alternate with the plurality of high voltage electrodes; and the front ends of the plurality of high voltage electrodes protrude toward the charge unit as compared to the front ends of the plurality of low voltage electrodes; characterized by an insulating member disposed between the high voltage electrode and the discharge wire, wherein the insulating member is disposed at a high voltage electrode located in a straight line with the discharge wire in the air flow direction from among the plurality of high voltage electrodes, wherein the insulating member is formed in a bar type extended in parallel with the discharge wire.