This invention provides a sun shield for automobiles. The sun shield has a collapsible framework for supporting a flexible cloth. The framework has at least three legs radially and isometrically extended from the framework. In the free end of each leg there is a sucker adapted to attach to the roof of an automobile. Therefore, the cloth can be easily mounted above an automobile to shade it from the unpleasant and damaging effects of the sun's rays, and it can also be easily detached from the roof of the automobile and folded into the trunk of the automobile.