A security door bar safety device elongated rod has a main extension portion having a distal end insertable within a hole within a floor adjacent to the door, and an arcuate handle end at a proximal end of said main extension portion. The arcuate handle end has extending downward therefrom a further partial extension, which is rotatable within a ferrule bar sleeve portion mounted adjacent to said door. The further partial extension portion is movable rotatably about the extension portion within the ferrule sleeve from a position of non-use to a locking position, wherein the main extension portion extends vertically parallel to said further partial extension portion.