Abstract: An apparatus for producing rifling grooves in a weapon barrel, in which a drawing head (1) that rotates about its longitudinal axis (5) is drawn through the respective weapon barrel by a drawing rod (2), and the rifling grooves are cut into the inside surface of the weapon barrel with corresponding drawing knives (9) disposed on the drawing head (1). To produce the rifling grooves in the respective weapon barrel at a Low cost, the drawing head (1) is provided with a central adjusting arbor (6), with which all of the drawing knives (9) can be simultaneously displaced outwardly. In the production of the rifling grooves, therefore, the drawing knives (9) need no longer be exchanged in a time-consuming process. Instead, only the setting of the drawing knives (9) is modified with the aid of the adjusting arbor (6).