A photographic paper processor includes plural liquid baths for containing liquid. The liquid baths have partition panels, and are adjacent to one another therewith. An opening formed in the partition panels has first and second inner surfaces opposed to one another. A submerged squeezing blade has a support end and a free end. The support end is secured to the first inner surface. The free end contacts the second inner surface, closes the opening in an openable manner, allows the photographic paper to pass through the opening, and blocks a flow of the liquid through the opening. The submerged squeezing blade is produced from metal having chemical resistance. Furthermore, a contact pressure changing cam increases a contact pressure of the free end on the second inner surface when the submerged squeezing blade closes the opening without passage of the photographic paper.