Abstract: The invention relates to a supporting and fastening device for contact wires comprising a preferably one-piece longitudinally extended supporting piece (28, 84) which can be fixed to a pole, pipe, a building well or the like. The inventive device also comprises a coupling element (12, 52, 64, 86; 130, 138) for connecting the supporting piece (28) to a bracing tube or the like. The supporting piece (28) comprises a preferably central, first hole (38) which is provided for interacting with a fitted connecting section (36, 132) of the coupling element and is configured for realizing a connection which can be plugged in, detached, is prevented from running, and which remains fixed when placed under tensile and or pressure load.