Abstract: The invention relates to an apparatus for developing photographs, inter alia color photographs and photographic strips with the aid of a developing drum adapted to be heated "au bain-marie" and to be rotatably driven about its longitudinal axis, to and from which drum the fluids required for development can be supplied and evacuated respectively. The invention has for its object to design such an apparatus in a manner such that during the developing process the temperature is maintained very constant so that in particular color photographs can be printed with very high, constant quality.For this purpose the apparatus embodying the invention is characterized in that apart from the developing drum all stock containers for the fluids required for development are disposed in liquid bath forming the developing drum and held therein during development.