The Falcon 9 launcher with the Dragon freighter was launched from the Cape Canaveral spaceport (Florida). The broadcast is on the NASA website.
This is the fourth flight from the first stage of the Falcon 9. It was previously used to launch a commercial satellite and two Crew Dragon manned missions.
The ship will be delivered to the International Space Station (ISS) 2.2 tons of cargo, including material for science experiments, new equipment, fresh fruit and vegetables for the astronauts.
Dragon is expected to stay on the ISS for about a month, then return to Earth based on the results of scientific work.
Earlier it was reported that NASA had postponed the spacewalk due to the indisposition of astronaut Mark Wande Hai.