Abstract: Automobile assembly line comprising a plurality of transferring carriages 4 to place and support the automobiles during a transferring operation, a first transferring circuit including a first closed loop line 5 to carry each transferring carriage, the first transferring line being comprised of many stations where automobile parts are assembled to the automobile body at each station, a plurality of transferring suspension frames 6 under which the automobiles are suspended and supported during transferring operation, a second transferring circuit including a second closed loop line to carry each unit of suspension frames, the second transferring line being comprised of many stations where automobile parts are assembled to the automobile body at each station, and a transferring mechanism to transfer the automobile body from the transferring carriage 4 of the first transferring line to the suspension frames 6 of the second transferring line at one location where the first transferring line and the second transfe