Abstract: A latch and lock guard for doors which comprises a pair of similar elongated bars of sufficient width and thickness for purposes of rigidity. Each bar has a flat base and a series of uniform, regularly spaced teeth extending integrally from the bar sideways along one edge. The width of the spaces between the teeth is slightly greater than the width of the teeth. Means are provided to secure solidly one bar to the external side of a door over the lock area, with its teeth pointing towards the adjacent door edge, and to secure solidly the other bar to the door jamb with its teeth pointing towards the door edge, the teeth of one bar fitting within the slots between the teeth of the other, and vice versa, in interlocking fashion when the door is in closed position.