Device for laser roughening surfaces of a plurality of workpiece openings which are spaced apart from one another, in particular surfaces of cylinder bores or a single cylinder bore, the device comprising at least one loading and unloading station in which a workpiece to be machined can be loaded into the device and an already machined workpiece can be removed from the device, at least one work station, the work station comprising at least one laser machining module for machining workpieces in the work station, the device further comprising a transfer apparatus which is designed to carry out a workpiece transfer between the loading and unloading station and the work station, the transfer apparatus being designed to carry out a transfer process of a workpiece to be machined from the loading and unloading station to the work station by means of a rotary movement and at the same time to carry out a transfer process of a machined workpiece from the work station to the loading and unloading station by means of the same rotary movement, the work station comprising at least one laser machining module which has a module axis, and a positioning apparatus via which a relative movement can be brought about between a workpiece arranged in the work station for machining and the laser machining module, the laser machining module comprising beam guiding optics which are designed to guide a laser beam for machining the surface in an output direction, which is inclined with respect to the module axis and a plane orthogonal to the module axis, onto the surface to be machined, and the laser machining module being designed and arranged to rotate the laser beam about the module axis, the beam guiding optics comprising a collimator unit for collimating the laser beam coming from a beam source and a focusing unit for focusing the collimated laser beam as well as a beam deflecting apparatus which determines the output direction and deflects the laser beam for machining the surface from a main optical direction extending along the module axis into the output direction, the rotation apparatus being designed to rotate the beam deflecting apparatus which determines the output direction relative to the collimator unit or relative to the collimator unit and the focusing unit about the module axis in order to cause the emerging laser beam to be rotated about the module axis, the laser machining module comprising a further beam deflecting apparatus in the optical path upstream of the beam deflecting apparatus which determines the output direction, and in particular upstream of the focusing unit, which further beam deflecting apparatus deflects the laser beam in the main optical direction, characterized in that the device further comprises a closure apparatus which is arranged and designed, in a shielded state, to separate the loading and unloading station from a work space of the work station in a laser radiation-safe manner, and in that the laser machining module comprises a rotation apparatus which comprises a direct drive which is designed as a hollow shaft drive, and a rotor of the hollow shaft drive is rotatable about an axis of rotation of the hollow shaft drive which corresponds to the module axis, and in that the focusing unit is held via a sleeve-like element extending into the rotor and connected to the housing, and in that the laser machining module comprises a process gas flow path, this comprising a portion extending in the main optical direction, the portion being arranged between the first further beam deflecting apparatus and the beam deflecting apparatus which determines the output direction and the process gas exiting at the outlet opening, the process gas flow path being designed such that the process gas flows along the outer side of the sleeve-like element which is used to hold the focusing unit.