Abstract: A resilient deflector for snowplows tapers to a blunt edge as it extends outwardly from the top edge of the snowplow blade, generally across the entire length of the blade. By aligning the deflector with the snowplow blade working surface, the blade working surface area is extended, aiding in funnelling the snow outwardly of the blade and decreasing the tendency of the snow to billow rearwardly, over the blade, obscuring a snowplow operator's field of vision. Since the deflector is resilient its curvature may vary automatically in response to the plowing speed and the accumulation of snow on the snowplow blade working surface.