The present invention refers to a module (2) for assembly of a filter frame (1) for at least one filter disc (not shown) of a rotatable disc filter, which filter frame is provided for supporting at least two filter segments (not shown), which filter segments together form the outer part of said filter disc. The module (2) comprises an intermediate member (5) intended to beat least partially provided between two adjacent filter segments. According to the invention, the intermediate member (5) comprises at least two parts (6, 7) which are interconnectable with each other in the radial direction of the disc filter