To provide an apparatus for cleaning an electronic filter, in which 1. scrach, damage, deformation does not occur, 2. soiling is satisfactorily and surely removed, 3. environmental problems do not occur, 4. treating time is shortened, 5. water stain does not remain and 6. a cleaning liquid is regenerated and recycled to surpress the use of the large amount of water.

The cleaning apparatus 1 is for removing the soiling stuck to the electronic filter A for air conditioner. As the cleaning liquid C, a bromine containing hydrocarbon solvent is used and the cleaning apparatus has a 1st vessel 2 filled with the cleaning liquid C and for carrying out ultrasonic cleaning, a 2nd vessel 3 filled with the cleaning liquid C and for carrying out the cleaning with jet containing bubbles and a 3rd vessel 4 filled with the cleaning liquid C and for carrying out steam cleaning and further has cooling apparatuses 5 for temperature control, which are installed, respectively, in the 1st vessel 2 and the 2nd vessel 3, a heater 19 for temperature control, which is incorporated in the 3rd vessel 4, and a regeneration apparatus 7 provided with a distiller or a decanter.