Abstract: A door frame having a threshold element (1), a pair of door posts (2) and a lintel element (3) connected together mechanically positively and non-detachably in pluggable manner. Tongues (28, 30, 32, 34) of the lintel element (3) are plugged into slots (37, 38, 39, 40) of the door posts (2) and an additional element (45) is pushed at the door post end onto the tongues. Thereafter, the additional element (45) is moved downwardly, wherein tongues (47, 49, 50, 51) of the additional element detent in slots (29, 31, 33, 35) of the lintel element (3). The upward movement of the additional element (45) is prevented by a tongue (44) that is bent into a recess (42) of the door post (2).