Abstract: A holder for bundles of optical fibers. The holder has end rings which are coupled in an adjusted manner at the smooth ends thereof, the rings having internal threaded regions for receiving the body of the holder which is provided with an external thread for said coupling and an internal thread for the bush for compressing a sealing gasket of the optical fiber cable, which gasket is fitted in the internal conical end of the body of the holder, the body also having a number of external cooling grooves.