| Competition: | Campeonato Brasileiro Série B |
| Season: | 2012 |
| Winners: | Goiás (2nd title) |
| Promoted: | Goiás Criciúma Atlético Paranaense Vitória |
| Relegated: | CRB Guarani Ipatinga Barueri |
| Matches: | 380 |
| Total Goals: | 1055 |
| League Topscorer: | 27 goals: Zé Carlos |
| Biggest Home Win: | Joinville 6–0 Ipatinga (July 17, 2012) |
| Biggest Away Win: | Ipatinga 0–6 Goiás (August 3, 2012) Barueri 0–6 Atlético Paranaense (September 7, 2012) |
| Highest Scoring: | 9 goals: Atlético Paranaense 5–4 América Mineiro |
| Prevseason: | 2011 |
| Nextseason: | 2013 |
In 2012, the Campeonato Brasileiro Série B, the second level of the Brazilian League, was contested by 20 clubs from May 19 until November 24, 2012. The top four teams in the table have qualified to the Campeonato Brasileiro Série A to be contested in 2013, meanwhile the bottom four were relegated to Campeonato Brasileiro Série C. It's considered the sixth best "second division" of the world.
| Team | Home city | Stadium | Capacity | 2011 season |
|---|---|---|---|---|
| ABC | Natal | Frasqueirão | 18,000 | 10th in Série B |
| América de Natal | Natal | Nazarenão | 4,000 | 4th in Série C |
| América Mineiro | Belo Horizonte | Independência | 23,000 | 19th in Série A |
| ASA | Arapiraca | Coaracy da Mata Fonseca | 14,000 | |
| Atlético Paranaense | Curitiba | Arena da Baixada | 25,180 | 17th in Série A |
| Avaí | Florianópolis | Ressacada | 17,800 | 20th in Série A |
| Boa Esporte | Varginha | Melão | 15,400 | 7th in Série B |
| Bragantino | Bragança Paulista | Nabi Abi Chedid | 13,200 | |
| Ceará | Fortaleza | Presidente Vargas | 20,600 | |
| CRB | Maceió | Rei Pelé | 18,500 | 2nd in Série C |
| Criciúma | Criciúma | Heriberto Hülse | 22,000 | 14th in Série B |
| Goiás | Goiânia | Serra Dourada | 50,000 | 11th in Série B |
| Grêmio Barueri | Barueri | Arena Barueri | 35,000 | 9th in Série B |
| Guarani | Campinas | Brinco de Ouro | 32,400 | 12th in Série B |
| Guaratinguetá | Guaratinguetá | Ninho da Garça | 15,700 | |
| Ipatinga | Ipatinga | Ipatingão | 27,500 | |
| Joinville | Joinville | Arena Joinville | 22,400 | |
| Paraná | Curitiba | Vila Capanema | 20,000 | |
| São Caetano | São Caetano do Sul | Anacleto Campanella | 16,700 | 15th in Série B |
| Vitória | Salvador | Barradão | 35,600 | 5th in Série B |