Roller conveyors of an aircraft cargo deck, including rollers for transporting freight packages, particularly containers, and a channel with side walls and a base for the installation of locking bar elements to hold the freight packages, are provided. The side walls have reinforcing sections with recesses in which the rollers are installed, whereby axles on which the rollers are rotatably mounted are fixed in each of the side walls. This results in an extremely sturdy but nevertheless lightweight construction.