The 2006–07 Primeira Liga (also known as BWINLIGA for sponsorship reasons) was the 73rd edition of top flight of Portuguese football.
It started on 27 August 2006 with a match between Vitória de Setúbal and Académica and ended on 20 May 2007.
The professional competitions shrunk from 18 to 16 clubs following last season's promotions and relegations' modifications.
However, the Lisbon team presented a complaint to the Portuguese League for Professional Football regarding the use of a non-registered player (Mateus) by 13th-placed Gil Vicente.
The penalty pretended by Belenenses would result in Gil Vicente being relegated in their place.