Provided is an apparatus for cleaning a fluid using an ultraviolet light-emitting diode. The apparatus includes an outer case, a fluid cleaning filter disposed in the outer case and filters the fluid introduced, a photocatalyst coated on a surface of the fluid cleaning filter, and a first light source unit mounted on the outer case to face a rear surface of the fluid cleaning filter in a direction in which the fluid is introduced, and emits light having a plurality of wavelength bands toward the rear surface of the fluid cleaning filter. Since the apparatus may have high sterilization and deodorization effects by emitting light having a plurality of wavelength bands and may improve filter reuse efficiency using a filter on which a photocatalyst is coated, the filter may be semi-permanently used and fluid cleaning efficiency may be improved.
