An ink pollution prevention device in a wet electrophotographic printer, for preventing a developer from polluting a photoreceptor and peripheral devices by flowing out at the ends of a development roller, a squeegee roller, and a cleaning roller, is provided with a pair of ink stoppers mounted around a shaft of each roller in a symmetrical manner with each other. Each ink stopper has a plurality of peaks and recesses which form a continuous helical shape in an opposite helical direction from the other ink stopper. The helical direction of the ink stopper is formed to permit the ink in the ink stopper to flow toward the center of the rollers when the rollers are rotated.