Juventus bounced straight back into the top flight of Italian football following their 5-1 win at Arezzo.
Juventus players celebrate promotion back to Serie A
The Turin club, demoted from Serie A and given a nine-point deduction last year following a match-fixing scandal, won Serie B with three games to spare.
Alessandro del Piero and Giorgio Chiellini put Juve 2-0 up, with Floro Flores pulling one back for Arezzo.
Chiellin and Del Piero both added second goals before David Trezeguet completed the scoring.
Juve boss Didier Deschamps said: "I asked the boys to end it today and not to think about the other matches.
"It brings great satisfaction and a lot of joy to everyone involved in this adventure."
Juve were originally demoted with a 30-point handicap, but that deduction was reduced to nine on appeal.
But they managed to hold on to many of their top stars and they stepped up to the plate to play a key role in the title clinching victory.
Gianluigi Buffon, rated the world's top goalkeeper, made an important double save early as Juve struggled to settle.
Del Piero eased their nerves with a superb shot across the keeper following a neat pass from Claudio Marchisio.
Chiellini punished a blunder by Arezzo keeper Nicolas Bremec to head in on 33 minutes, but Antonio Floro Flores exposed a Juve defence that will need rebuilding for the test of Serie A, by pulling one back.
Juve stepped up the pace after the interval and Chiellini finished off Del Piero's free-kick before Del Piero nodded in his second.
Another of Juve's big stars, France international Trezeguet, turned in the fifth.