Abstract: A flexible safety screen which is designed for storage in an enclosure located above a doorway and deployment downwardly from the enclosure for tensioned attachment to the floor, in order to protect the occupants in a room from intruders. In a first preferred embodiment the screen is rolled on a shaft journalled for rotation in the housing and deployed by means of an electric motor and gear mechanism and according to a second embodiment of the invention, the screen is alternatively manually rolled on the shaft and deployed from the shaft and housing and tightened after being secured to the floor, by means of a crank and ratchet mechanism. In a most preferred embodiment of the invention the screen is characterized by flexible nylon webbing.