2017–18 Nemzeti Bajnokság I/A (men's basketball)

The 2017–18 Nemzeti Bajnokság I/A is the 87th season of the Nemzeti Bajnokság I/A, the highest professional basketball league in Hungary. Alba Fehérvár is the defending champion.

Teams
DEAC was promoted to this season as champions from the Hungarian 2016–17 NB I/B. Vasas SC left the league.

Playoffs
Teams in bold won the playoff series. Numbers to the left of each team indicate the team's original playoff seeding. Numbers to the right indicate the score of each playoff game.

Quarter-finals
In the quarterfinals, teams playing against each other had to win three games to win the series. Thus, if one team wins three games before all five games have been played, the games that remain are omitted. The team that finished in the higher regular season place, played the first, third and the fifth (if it was necessary) games of the series at home.

Semi-finals
In the semifinals, teams playing against each other had to win three games to win the series. Thus, if one team wins three games before all five games have been played, the games that remain are omitted. The team that finished in the higher regular season place, played the first, third and the fifth (if it was necessary) games of the series at home.

Finals
In the finals, teams playing against each other had to win three games to win the title. Thus, if one team won three games before all five games were played, the remaining games were omitted. The team that finished in the higher regular season place, played the first, the third, and the fifth (if it was necessary) games of the series at home.

Third place
In the series for the third place, teams playing against each other had to win two games to win the 3rd place in the final rankings of the season. Thus, if one team won two games before all three games had been played, the remaining games were omitted. The team that finished in the higher regular season place, played the first and the third (if it was necessary) games of the series at home.

Playout
Higher ranked team hosted Game 1 plus Game 3 if necessary. The lower ranked hosted Game 2.

All-star game
The all-star game was played on 2 December 2017 and was played at the Tüskecsarnok in Budapest.