To provide a developing processor which can be made compact by improving a part performing stabilization processing.

A crossover rack 36 which sends photographic paper P lifted from the liquid surface of stabilization processing liquid (STB) in a stabilization processing tank 23A among a plurality of stabilization processing tanks to a next stabilization processing tank 23B is equipped with a roller unit R which rotates in contact with the photographic paper P. This roller unit R comprises a roller 53 of a sponge and the like, a cylindrical member 54 which houses the roller 53, and a driven roller 58 disposed opposite the roller 53. The stabilization processing liquid (STB) is sent in the cylindrical member 54 and then supplied to a photosensitive surface of a photographic paper P in contact with the roller 53 to carry on stabilization processing.