Abstract: A protective cover for vehicle windows which includes a length of flexible sheet material having a first retainer clamp provided on one end for removable attachment to one of the front door posts of a vehicle, three additional retainer clamps adapted for engaging the sheet material in spaced relationship with respect to the first cover clamp and attachment to the remaining front door post and the rear window posts of the vehicle and a leading edge member attached to the opposite end of the sheet material for removably engaging the first cover retainer clamp to secure the sheet material over the windshield, rear window and side windows of the vehicle. In a preferred embodiment a rubber seal is provided at the top edge of the cover sheet and clamp retainers are attached to the cover retainer clamps, to further secure the protective cover on the vehicle and minimize theft of the protective cover.