Abstract: An apparatus for continuous development of photographic materials, particularly photographic plates, comprising between an input and an output terminal a series of a least two modules of vertical arrangement and a forwarding unit between each pair of the modules wherein each module includes passing rolls arranged along three vertical columns and a reversing roll in the lower part of the module connected to two of the columns, characterized in that the modules are arranged closely adjacent and separated by walls of cross-section forming in both modules a line crossing the tangential plane to the passing rolls which are arranged in two adjacent columns separated by the walls.