Launch from the Baikonur Cosmodrome; landing 180 km northwest of Karaganda.

It was to get the spacecraft rendezvoused with Soyuz 7 and Soyuz 8 and to have taken spectacular motion pictures of the Soyuz 7 - Soyuz 8 docking. It became a joint mission of three spacecraft with Soyuz 7 and Soyuz 8 but no rendezvous, due to a failure in the rendezvous electronics in all three spacecraft, so there was only an approaching. First vacuum welding in space by Kubasov using welding construction "VULKAN". The crew tested three different methods of welding. The weld quality was said to be in no way inferior to that of Earth based welds. Several scientific und technical experiments were also performed.