50 or also to the gear box 44 in order to be able to guide the working laser beams 13 16 to the workpiece 18 in the desired and space saving way they must be combinable in a predetermined way this combination is realized primarily with the laser beam optics near the end face 24 which is arranged in a housing 22 the housing 22 is fastened on the end face 34 with fastening means 22 u2032 and has here a beam exit 23 which opens into a beam passage 24 u2032 of the end wall 24 opposite the beam exit 23 i e facing away from the workpiece the housing 22 supports a beam displacement module 27 this module 27 has a first displacement mirror 28 which is arranged in the first beam path 12 of the first working laser beam 13 so that this working laser beam 13 impinges on the displacement mirror 28 and is deflected vertically to the first beam path 12 as a result of this deflection the first working laser beam 13 impinges on a second displacement mirror 29 by which the first working laser beam 13 is deflected into a second beam path 14 the first working laser beam 13 reaches the housing 22 along the second beam path 14 up to the point of its beam exit 23 the third beam path 14 for the second working laser beam 16 is.