An electrostatic precipitator comprising a housing having an air duct that is formed inside said housing for communication between an inlet for sucking contaminated air containing fine particles and an outlet for discharging resulted clean air after removing said fine particles, an air flow generating means for generating an air flow in the air duct for sucking said contaminated air and discharging said clean air, a discharge means that is formed in said air duct for charging said fine particles that are contained in said contaminated air by corona discharge, a collecting means that is formed in said air duct for collecting said fine particles that had been charged by said discharge means by using the Coulomb force, and a discharge voltage supplying means that is electrically connected to said discharge means for supplying the discharge voltage that enables said corona discharge, wherein said collecting means comprises: an adsorption shaft that bridges said air duct perpendicular to a direction of said air flow, a plurality of adsorption plates that are generally discoid, installed on said adsorption shaft while the adsorption surfaces oppose each other, for adsorbing and collecting said fine particles on said adsorption surface by using the Coulomb force, and an adsorption plate rotating means that is connected to one end of said adsorption shaft for rotating said adsorption plates around said adsorption shaft; characterized in that said discharge means comprises: a discharge axis that is electrically connected to said discharge voltage supplying means, a plurality of charging plates that are supported by said discharge axis, each of said charging plates being inserted between a pair of said adsorption plates that oppose each other and has discharge surfaces approaching the adsorption surfaces of the adsorption plates, and arranged while being electrically insulated from the adsorption plates; and a plurality of discharge electrodes with pointed ends at their tips that project from an inlet-opposing edge of said charging plate towards said inlet wherein said pointed ends of said discharge electrode are arranged away from the plate edge of the adsorption plate and towards the side of the adsorption shaft so that said corona discharge is generated towards the adsorption surface of the rotating adsorption plate. an adsorption shaft that bridges said air duct perpendicular to a direction of said air flow, a plurality of adsorption plates that are generally discoid, installed on said adsorption shaft while the adsorption surfaces oppose each other, for adsorbing and collecting said fine particles on said adsorption surface by using the Coulomb force, and an adsorption plate rotating means that is connected to one end of said adsorption shaft for rotating said adsorption plates around said adsorption shaft; characterized in that said discharge means comprises: a discharge axis that is electrically connected to said discharge voltage supplying means, a plurality of charging plates that are supported by said discharge axis, each of said charging plates being inserted between a pair of said adsorption plates that oppose each other and has discharge surfaces approaching the adsorption surfaces of the adsorption plates, and arranged while being electrically insulated from the adsorption plates; and a plurality of discharge electrodes with pointed ends at their tips that project from an inlet-opposing edge of said charging plate towards said inlet wherein said pointed ends of said discharge electrode are arranged away from the plate edge of the adsorption plate and towards the side of the adsorption shaft so that said corona discharge is generated towards the adsorption surface of the rotating adsorption plate. a discharge axis that is electrically connected to said discharge voltage supplying means, a plurality of charging plates that are supported by said discharge axis, each of said charging plates being inserted between a pair of said adsorption plates that oppose each other and has discharge surfaces approaching the adsorption surfaces of the adsorption plates, and arranged while being electrically insulated from the adsorption plates; and a plurality of discharge electrodes with pointed ends at their tips that project from an inlet-opposing edge of said charging plate towards said inlet wherein said pointed ends of said discharge electrode are arranged away from the plate edge of the adsorption plate and towards the side of the adsorption shaft so that said corona discharge is generated towards the adsorption surface of the rotating adsorption plate.