Abstract: A mechanical security device or door guard in the form of an elongated latching member arranged to extend laterally across and in close proximity to a door when closed for positively maintaining the door in a closed position, with one end of the latching member being pivotally connected to one vertical door jamb located adjacent the edge of the door provided with the handle and the other end of the latching member being removably received by a generally J-shaped clip carried by the other vertical door jamb to which the door is hingedly connected.