The problem to be solved is to provide a door frame and a method of manufacturing the same, with reducing manufacturing cost. A door frame has a rear sash (vertical sash) (41) for supporting door glass and has a lock-device mounting bracket (door-frame component) (70) attached by welding to the rear sash (41) and having formed therein through-holes (70e, 70d) for welding. Weld beads (73, 75) are formed between the rear sash (41) and the wall surfaces of the through-holes (70e, 70d) for welding, the through-holes (70e, 70d) being formed in the lock-device mounting bracket (70).