Abstract: An air cleaner is provided that may include a cylindrical case including an inlet through which air is suctioned in a radial direction into the cylindrical case; a filter configured to be detachably provided in the case and having a cylindrical shape; and a filter frame configured to support the filter. The filter frame may include a lower frame provided at a lower portion of the filter; an upper frame provided at an upper portion of the filter; and a plurality of supporting frames that extends toward the upper frame from the lower frame. An entry portion for the suctioned air may be formed between the plurality of support frames, the entry portion being configured to receive the filter.