Abstract: A window scaffolding system including a pair of main support frames. The pair of main support frames are oriented in a side by side relationship for supporting planks of wood on upper and lower ends thereof. A pair of L-shaped window engagement members couple with the pair of main supports for securement to a window opening. A supplemental safety bar is provided having a generally elongated and planar configuration. The safety bar has a pair of pads disposed on opposing ends thereof and a central pad disposed on a central portion thereof. A bolt extends through the central portion and the central pad for securement to the window engagement members to preclude the system from disengaging the window opening.