Abstract: Chain conveyor with support chain comprising a frame mounting a drive sprocket and a tension sprocket, as well as an endless traction chain running therearound having a working run carrying a load that is transported, which run is supported by guides fixed to the frame through rollers having their rotational axes extending parallel with the axes of the sprockets, the rollers being pivotally interconnected in series with their ends to form an endless chain freely passing through openings in the frame, the portions of the guides surrounded by this chain having rounded portions.