Abstract: A continuous processing machine for photographic material, particularly sheet-shaped photographic paper, has an input unit for the sheet material to be treated and a variable number of treatment units of the same structure which can be fitted together with one another to form a modular system. Each treatment unit is equipped with a set of conveying rollers and with a synchronous motor used as the drive and includes a toothed gear transmission, the ratio of which can be adjusted corresponding to given values of the advancing speed of the sheet material. A conveyor worm in the bath receptacle of each treatment unit driven by the same motor provides an effective circulation of the bath.The modular structure makes it possible to fit together a variable number of treatment units which are similar with respect to one another to form an equipment unit which, depending on the configuration stage is suitable for different treatment processes.