It started on 29 September 2017 with the first round of the regular season and ended on 19 June 2018 with the finals.

A total of 18 teams contested the league, including 16 sides from the 2016–17 season and two promoted from the 2016–17 LEB Oro.

As of 10 July 2017, the ACB, forced by the statement of the National Commission for Markets and Competence (CNMC), agreed with the Spanish Basketball Federation and endorsed by the CSD to reduce the requirements to fulfill by the promoted teams for playing in the league.

[1] On August 11, 2017, the ACB proceeded to the precautionary and provisional registration of the Real Betis Energía Plus, in application of the precautionary measures issued by the judicial demand of the Andalusian club.

Attendances include playoff games: Source: ACBNotes:1: Team played last season in LEB Oro.