An electrostatic precipitator includes: a charging unit configured to charge foreign materials; and a dust collecting sheet configured to collect the foreign materials charged in the charging unit. The dust collecting sheet includes: a first electrode; a second electrode spaced apart from the first electrode to face the first electrode and configured to collect the foreign materials passed through the charging unit; a first power connector connected to the first electrode and configured to apply a voltage to the first electrode; a second power connector connected to the second electrode and configured to apply a voltage to generate a potential difference with respect to the first electrode to the second electrode; and a third power connector connected to the second electrode and configured to heat the second electrode. The third power connector is closer to the second power connector than to the first power connector.