A method for aiming a weapon barrel [B], wherein a target image [Z*] and a target marker [X] are displayed with the aid of an image visualization unit M. The rough aiming of the weapon barrel [B] is performed in a first phase, in a second phase, with the weapon barrel [B] stationary, sighting by sighting the target image [Z*] by means of the image visualization unit [V] is performed, wherein the target image [Z*] and the target marker [X] are brought into coincidence as closely as possible, and fine aiming of the weapon barrel [B] in a third phase. The device for executing the method comprises a device for setting an initial gun sight angle [.psi..sub.o] an image visualization unit [V], the latter displays a target image [Z*] and a target marker [X] representing the end of an imaginary projectile trajectory [p]. The device contains a fire control device, with the image visualization unit [V], an angle measuring device [Y] for measuring angular changes [.DELTA..psi.] and a data processing unit [EDV] for performing a ballistics calculation, in which the angular change [.DELTA..psi.] and the interior ballistics can be taken into consideration, as well as for issuing a signal determining the target marker [X]. The device is suitable for infantry weapons.