A rack for processing a photosensitive material includes a roller transport mechanism composed of a plurality of transport rollers for transporting the photosensitive material to dip the photosensitive material in a processing solution contained in a processing tank. The plurality of transport rollers includes two pairs of generally opposed rollers, the two pairs being disposed adjacent to each other along a path of transport of the photosensitive material. The rollers of each pair of rollers between which the photosensitive material passes is spaced from each other by a distance greater than the thickness of the photosensitive material. A shutter mechanism is provided for covering the surface of the processing solution. The shutter mechanism is disposed between the two pairs of rollers.
