The Brazilian Olympic Committee (Comitê Olímpico Brasileiro, COB) sent a total of 258 athletes to the Games, 136 men and 122 women, to compete in 24 sports.

In the second week of the Games, another unprecedented event happened when the gymnast Arthur Zanetti made history again by conquering the gold medal in men's rings.

Arthur Zanetti had already shown his potential in the 2011 World Artistic Gymnastics Championships when he won the silver medal.

On the penultimate day of the Games, Team Brasil won its third gold medal, the only collective sport in this edition.

and hoped for another combination of results in which the United States would have to win their last two games (South Korea and Turkey), which ended up happening.

Half of team was consecrated, since they were remnants of the team that four years earlier was also an Olympic champion: Fabiana Claudino, Fabiana de Oliveira, Paula Pequeno, Jaqueline Carvalho, Sheilla Castro and Thaísa Menezes made history to be the first Brazilian women to become two-time Olympic champions.

The coach José Roberto Guimarães also wrote his name in history as the first three-time Olympic volleyball champion (male or female).

The Brazil men's national volleyball team was silver medalist of the tournament, losing the gold medal in a dramatic match by 3 to 2 to Russia.

Alison Cerutti and Emanuel Rego went to the gold dispute against the Germans Julius Brink and Jonas Reckermann and fought a balanced duel that, to the sadness of the Brazilian fans, ended with a tight victory of the rivals by 2 to 1 (23/21, 16/21 and 16/14) in the Men's beach volleyball .

In the women's beach volleyball a bronze medal was obtained by Juliana Felisberta and Larissa França.

Thiago Pereira finally won an Olympic medal in the Men's 400 m individual medley with a South American record of 4:08.86, an event where Michael Phelps was in the fourth place.César Cielo the incumbent Olympic and World Champion was the bronze medal of the Men's 50 m freestyle.

Esquiva Falcão was the silver medalist in men's middleweight after losing to the Japanese Ryota Murata by 14 to 13.

Robert became one of the most successful Brazilian athletes in history with a total of five Olympic medals, tying the record of Torben Grael.

He is also one of the sailors with the largest number of Olympic medals of all time, along with Torben Grael and British Ben Ainslie.

With Rio de Janeiro being the host city of the 2016 Summer Olympics, a Brazilian segment was performed during the closing ceremony.

The Brazilian team featured three defending champions from Beijing, including long jumper Maurren Maggi and freestyle swimmer César Cielo, who both became the nation's first athletes to win gold in their sporting events.

Equestrian show jumper Rodrigo Pessoa, and table tennis player Hugo Hoyama became the second and third Brazilian athlete to compete in six Olympic Games.

Other notable Brazilian athletes featured NBA basketball players Leandro Barbosa and Tiago Splitter, taekwondo jin and bronze medalist Natália Falavigna, double New York marathon champion Marílson dos Santos, and medley swimmer and multiple-time Pan American games medalist Thiago Pereira.

[19][20] Prior to the tournament, Elaine withdrew injured and was replaced on 23 July 2012 by Danielli, who was initially selected as an alternate player.

[36] Qualifiers for the latter rounds (Q) of all events were decided on a time only basis, therefore positions shown are overall results versus competitors in all heats.

[39] Head coach: Bernardo Rezende The following is the Brazilian roster in the women's volleyball tournament of the 2012 Summer Olympics.