Abstract: An apparatus for electrostatically purifying non-conductive liquids is disclosed and includes a tank; anode and cathode plates disposed in an interleaved opposed relationship within the tank; a conduit for introducing liquid to be treated into the tank, the conduit being disposed between lower edges of the electrode plates and having apertures at the upper surface thereof for dispersing liquid between the electrodes; a plurality of particle collecting members made of porous dielectric fiber disposed between the electrode plates so as to be in parallel with the direction of the electric field created by the electrode plates and the flow of liquid spurted from the conduit thereby defining a particle precipitation space between the conduit and the bottom of the tank; a liquid supply pipe communicating with the liquid conduit; a liquid outlet pipe for removing the treated liquid from the upper part of the tank to the exterior; and a drainage pipe for discharging the liquid remaining in the particle precipitation