This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Left Opposition of PCE" – news · newspapers · books · scholar · JSTOR (December 2009) (Learn how and when to remove this template message)

Left Opposition of PCE (Spanish: Oposición de Izquierda del PCE) was initially founded as an internal tendency within the Communist Party of Spain (PCE), but later evolved into an independent formation. It started publishing Voz comunista in 1973.

OPI-PCE promoted abstention in the 1976 referendum. In 1977 OPI-PCE founded the Workers' Communist Party (PCT).

Secretaries-General

Antonio García (1921–1923)
César Rodríguez (1923–1925)
José Bullejos (1925–1932)
José Díaz (1932–1942)
Dolores Ibárruri (1942–1960)
Santiago Carrillo (1960–1982)
Gerardo Iglesias (1982–1988)
Julio Anguita (1988–1998)
Francisco Frutos (1998–2009)
José Luis Centella (2009–2017)
Enrique Santiago (2018–present)

Organization

Regional branches	Andalusia Aragon Asturias Balearic Islands Basque Country/Navarre Canary Islands Cantabria Castile and León Castilla–La Mancha Catalonia Extremadura Galicia Madrid Murcia La Rioja Valencian Country
Affiliated organisations	Communist Youth Union of Spain Mundo Obrero

Assemblies

1st (1922)
2nd (1923)
3rd (1929)
4th (1932)
5th (1954)
6th (1959–60)
7th (1965)
8th (1972)
9th (1978)
10th (1981)
11th (1983)
12th (1988)
13th (1991)
14th (1995)
15th (1998)
16th (2002)
17th (2005)
18th (2009)
19th (2013)
20th (2017)
21st (2022)