Abstract: Optoelectrical coupling arrangement composed of a carrier element having a side face and provided with at least one trough-shaped recess extending to the side face, at least one beam waveguide element fastened in the recess and presenting an end face positioned to lie in the region of the one side face of the carrier element, and at least one photodetector fastened to the side face and having a light-sensitive region positioned to receive a substantial portion of the light emanating from the end face of the beam waveguide element. The carrier element comprises at least one electrical conductive path connected electrically to the photodetector.