Renaud Lavillenie of France was unable to successfully defend his 2012 gold, but became the seventh man to win two medals with silver this time.
One of Brazil's best athletics medal hopes was Thiago Braz, the 2012 World Junior Champion (ahead of Barber), who had the third best mark of the year.
The American champion Sam Kendricks was also highly ranked and had won silver at the 2016 World Indoor Championships behind Lavillenie.
[6] After one attempt by Xue Changrui, the final round was delayed for one hour and restarted from scratch due to a rainstorm that passed through.
Six competitors had already exited the competition before defending champion/world record holder Renaud Lavillenie took his first attempt at 5.75 m. Among the eliminated was 2015 World Champion Shawnacy Barber.
There was a great deal of strategic passing in this event, place meaning everything in the Olympics as opposed to most other competitions where the fraternity of pole vaulters are all seeking to improve their personal best.
Sam Kendricks was high over his bars earlier in the competition but could go no further than 5.85 m and had to settle for bronze, while Lavillenie held the lead with a clean round of first attempt clearances to 5.98 m (the latter improving his own Olympic record from London).
Home town favorite Thiago Braz cleared an outdoor personal record of 5.93 m on his second attempt to surpass Kendricks.
The clearance remains tied with Okkert Brits and Jeff Hartwig as the ninth highest jump in history, and currently stands as the Olympic record.
The Frenchman took his final attempt at 6.08 metres, unsuccessfully; with the gold medal secured, Braz did not jump at the greater height.