Abstract: A mud flap lifting system for trucks pushes the mud flaps from their inside surface upward and rearward away from the rear tires. Push bars swing about a pivot from the underside of the truck body directly behind the mud flap. The push bars include C-shaped arms which receive the upper portion of the folded mud flap as it is retracted. Fully retracted, the mud flap is compactly folded so that it is less susceptible to damage. The lift mechanism is pneumatically powered by a single centrally-located cylinder which actuates twin linkages on either side of the truck through a transverse pivoting axle so that both mud flaps may be retracted simultaneously by a single pneumatic actuator.