Rotation laser device with an inclined laser level and method for aligning a rotation laser device

The apparatus (1) has a laser device (3) producing a laser beam (5), and a leveling device (14) aligning the laser beam in a horizontal plane that is arranged perpendicular to a gravity field of earth. An inclination device (17) inclines the laser beam around an inclination axis (X) with respect to the horizontal plane. A rotational unit (9) partially moves the laser device around a rotational axis (4) with a rotational speed. A measuring unit (21) determines a rotational angle of the laser device around the rotational axis. A memory device (22) is provided for storage of an angular position. An independent claim is also included for a method for aligning a rotation laser apparatus.