The 66-year-old, who took charge in May 2025 after leaving Real Madrid, said he and the federation shared the same ambition of restoring the Selecao to the summit of world football after more than two decades without lifting the World Cup trophy.
"A year ago, I arrived in Brazil. From the first minute, I understood what football means to this country," Ancelotti said in a video released by the CBF.
"For a year, we have been working to bring the Brazilian national team back to the top of the world, but the CBF and I want more - more victories, more time, more work.
"We are very happy to announce that we will continue together for another four years. We will go together until the 2030 World Cup."
Since taking over, Ancelotti has guided Brazil through 10 matches, recording five wins, two draws and three defeats while overseeing qualification for the 2026 World Cup in the United States, Canada and Mexico. His side has scored 18 goals and conceded eight during that run.
Brazil turned to Ancelotti after a turbulent period that followed the departure of former coach Tite after the 2022 World Cup. The Selecao cycled through three different managers before appointing the Italian, who became the first foreign coach to permanently manage Brazil since Argentine Filpo Nunez's brief stint in 1965.
The CBF believes Ancelotti's experience and calm leadership can help end a difficult era for the five-time world champions, who have not won the World Cup since 2002 and suffered consecutive quarter-final exits in 2018 and 2022.
Attention now turns to Monday's squad announcement, when Ancelotti names his final group for the World Cup. One of the biggest talking points remains whether Neymar will return to the national side after missing international action since 2023 because of a serious knee injury.
Brazil have been drawn in Group C alongside Scotland, Morocco and Haiti, with the team set to be based in New Jersey during the tournament. They will also play a warm-up match against Panama at the Maracana Stadium on May 31.
