Dungeon Master's Guide

 is an ambiguous term. It can refer to:
 * Dungeon Masters Guide (1e)
 * Dungeon Master's Guide (2e)
 * Dungeon Master's Guide (3e)
 * Dungeon Master's Guide (3.5e)
 * Dungeon Master's Guide II for 3.5e
 * Dungeon Master's Guide (4e)