Cinemateca Portuguesa, Film archive and movie theater in central Lisbon, Portugal.

Cinemateca Portuguesa is a film archive and movie theater in Lisbon housed in a building on Rua Barata Salgueiro. The facility features two screening rooms, a film collection, a museum, and an extensive media archive.

Founded in 1948 as the Cinemateca Nacional, it grew out of a collection from the Estado Novo's National Propaganda Secretariat, with Manuel Félix Ribeiro as first director. Its first public screening was held at Palácio Foz on 29 September 1958. The state bought 39 Rua Barata Salgueiro in 1979, and the new cinema opened there in 1980; the building reopened in December 2002 after restoration by architects Alberto Castro Nunes and António Maria Braga.

The name Cinemateca follows the model of the Cinémathèque Française, which director João Bénard da Costa took as a reference for regular screenings of film-history works. The library opened on 30 September 1958, the day after the first public screening at Palácio Foz. Since 2007 the Cinemateca Júnior, based at Palácio Foz, has run workshops, visits to an interactive pre-cinema exhibition and film shows for children and families.

The building at Rua Barata Salgueiro 39 has three projection spaces: the 227-seat Dr. Félix Ribeiro hall, the 47-seat Luís de Pina hall, and a terrace used for open-air screenings in summer. The library is open to the general public, with a consultation room and a reading room for books and photographic material. The Cinemateca Júnior, based at Palácio Foz, runs activities for children and families.

The Cinemateca Júnior, created in 2007 and based at Palácio Foz, runs regular workshops, guided visits to an interactive pre-cinema exhibition and film screenings for children and families. Its home is separate from the Rua Barata Salgueiro building that holds the main cinemas and the 39 Degraus museum space.