Beckham made his first appearance for PSG as a second-half substitute in the 2-0 Ligue 1 home win over Marseille on Sunday.
The former Manchester United and England midfielder - who opted for Paris ahead of numerous other offers after the end of his contract with Los Angeles Galaxy in America's Major League Soccer - could once again face countryman Joey Barton who played for Marseille on Sunday. Ancelotti told a press conference: "He will start. Beckham can play the whole match."
The 37-year-old, who has also played for Real Madrid, did enough to prove to Ancelotti with his performance on Sunday - when he played a part in the second goal after coming on as a 76th-minute substitute - that he is ready to start a game.
Ancelotti is bringing Beckham in to replace suspended midfielder Marco Verratti to play alongside Blaise Matuidi or Clement Chantome.
Ancelotti added: "He will play instead of Verratti.
"This is an important position on the field, it will help the team in building the game and have good positioning. He can play a whole game."