Abstract: A ladder bracing system is used to safely lean a ladder against a building. The system includes a ladder, a first bracing arm, a second bracing arm, a bridge, a first ladder-gripping clamp and a second ladder-gripping clamp. The first bracing arm and the second bracing arm are connected to opposing ends of the bridge. The first bracing arm and the second bracing arm are used to stabilize the ladder against a building without damaging the building. The first ladder-gripping clamp is connected to the first bracing arm and the second ladder-gripping clamp is connected to the second bracing arm. The first ladder-gripping clamp and the second ladder-gripping clamp are used along with the bridge to secure the first bracing arm and the second bracing arm along the ladder. The bridge may be moved along the ladder through the use of an adjustment cable and a pulley.