Abstract: A chain door guard assembly has a chain fixed at one end with chain heads along its length and a guard plate having a raised main body section and flanges for attaching the guard plate to a door. The main body section of the guard plate contains a long slot and a plurality of entry slots which permit insertion of a plurality of chain heads into the long slot. Two independent entry slots, for accepting a chain head in one instance and a chain-attached slide bolt in the other, are also provided. The resulting chain door guard assembly affords selectively varying degrees of security and convenience, achieved by the insertion of those chain heads into their designated entry slots. This door guard assembly may be used for left or right side door installation.