Abstract: In application, the vehicle security screen is installed in the delivery vehicle such that an upper end of the serrated plate is received in the top portion of the vehicle's window encasement, the side ends of the serrated plate are received in the side ends of the vehicle's window encasement, and the security screen is them firmly held in place within the window encasement by the upper edge of the vehicle window engaged with the brackets. A vehicle's security screen that can be installed within a window frame of a vehicle door of a delivery vehicle. The vehicle security screen generally including a serrated plate and brackets. The brackets are affixed to a lower end of the serrated plate and brackets are sized to fit over and around a door window of a vehicle.