Abstract: A safety device for stabilizing the upper end of a ladder against the exterior wall of a building or other resting surface comprising a tubular body of a length greater than the typical ladder width and having coaxial and coextensive inner and outer contiguous tubular sections. The inner tubular section is a normally rigid temporarily deformable member and the other tubular section is a resilient slip-resistant sheath. The tubular body is provided with spaced-apart longitudinally aligned openings permitting insertion-registration of ends of the ladder stiles, and straps are provided for removably securing the device to the ladder.