Abstract: There is provided a filter including elements, each being made from non-woven fabric, which are placed on one right after the other, the two outermost elements being coated with a waterproof agent. The filter according to the present invention provides an advantage of permitting air to smoothly pass through it and effectively removing moisture and fine dust particles from air passing through it, as well as preventing production of static electricity. Furthermore, the filter can be manufactured with ease.