A filter element (1) for a filter apparatus (2) comprises at least one filter member (3)and a frame member (4) arranged to support the at least one filter member (3) in such a manner that the internal cavity (12) is formed. The filter member (3) comprises a permeable membrane layer and has a first filter surface (9a) for receiving a pressure and directed towards an internal cavity (12) arranged inside the filter element (1), and a second filter surface (9b) for receiving solid particles filtered from a feed. The filter member (3) forms a capillary filter.