Abstract: An improved roof scaffolding system for a steeply pitched roof includes a pair of rails supported on casters and connected by planks supported on plank support brackets mounted along the rails. Each rail includes a ridge hook which reaches over the roof ridge and rests on a caster touching the opposite side of the roof. When the scaffolding system is to be moved laterally along the roof on which work is to be done, the rails may roll on the casters to the desired location. When the scaffolding system is in place for work to be done, stand assemblies can lower stands which raise the rails off the casters supporting them. Optionally a gable anchor is used to provide a connection point for a rope cable which may be pulled to move the scaffolding system toward the gable end on which the anchor is located.