A nanofiber filter includes: a first support having a front surface and a rear surface opposite to the front surface; a first nanofiber filter layer disposed on the rear surface of the first support; a second nanofiber filter layer disposed on a rear surface of the first nanofiber filter layer; a third nanofiber filter layer disposed on a rear surface of the second nanofiber filter layer; and a second support disposed on a rear surface of the third nanofiber filter layer.