To constitute a developing processor which performs proper processing by suppressing improper processing of a photographic paper lifted from the surface of a liquid in a processing tank.

A feed rack 34 for conveying photographic paper P above the surface of a liquid in each processing tank, a plurality of crossover racks 35, and a squeeze rack 36 are equipped with nozzles N, and a processing liquid is jetted from the nozzles N to the photographic paper to accelerate processing and also form a film of the processing liquid on a photosensitive surface of the photographic paper P, thereby stopping the photosensitive surface from coming into contact with oxygen.