Cagliari have been confirmed as the latest Serie A club to take up a permanent place in the top flight.
The Giallorossi will move into the top division for the first time, while Udinese and Lazio will also be in the league for the second time.
It is expected that Napoli will return to Serie A, and that Inter will be promoted.
The other Serie A clubs to stay in Serie A are AC Milan, Lazio, Udinese, Sampdoria and Fiorentina.
They will all play in the Europa League next season.
Napoli are the latest club to join the elite group of the top European clubs.
This season they are currently top of Serie A with 23 points from 14 games.
They also won the Coppa Italia with a 4-0 win over Fiorengina, while Lazio were third in Serie B with 10 points.
Udinese finished third in the table last season.
They had a disappointing campaign in the Segunda B, finishing third last season, with 16 points from 11 games.
Lazio made it into the Champions League last season and won the last-16 of the Europa Cup.
Udine finished third last year and finished third overall in the Serie A. They finished fourth in Serie C last season before the transfer window closed.
The club is led by coach Marco Melandri, who won two Scudetti with Lazio.
It will be a new challenge for the Nerazzurri, as they were last season runners-up in Serie D. The last time they finished top of the table was in 2013-14.
Lazaro finished sixth last season in Serie E, but were relegated from the league.
Udina finished second last season after finishing in the relegation zone last season with 12 points from 15 games.
AC Milan and Udinese are the last two Serie A teams to make the jump from Serie B. Milan have joined Serie B in 2018, while Juventus and Roma have joined the Serie C. Udini were the last Italian side to join Serie C, in 2005-06.
Lazia were the first Italian club to make it into Serie C in 2013, and have since qualified for the Champions Cup.
Inter are in the third tier in Italy, after finishing sixth last year.
They are currently fourth in the Italian Serie A table.
Lazial won the Europa Ligue 1 with a 2-1 victory over Paris Saint-Germain in the final.