Juan López Sánchez (16 January 1900 – 1972) was a Spanish construction worker, anarchist and member of the Confederación Nacional del Trabajo (CNT, National Confederation of Labor), and one of the founders of the Federación Sindicalista Libertaria.

After the war he spent several years in exile before returning to Spain where he lived without persecution and participated in the "vertical" trade union movement authorized by the dictatorship of General Francisco Franco.

During the dictatorship of Miguel Primo de Rivera he fought in the underground and participated in the congress that produced the split between the CNT and the Federación Anarquista Ibérica (FAI).

[2] Pestaña and his allies launched the Federación Sindicalista Libertaria (FSL, Anarchist Trade Union Federation), in January 1933.

[5] López and Joan Peiró became the theoretical leaders of the FSL, and worked to bring it back into the fold of the CNT.

[7] With the approach of Nationalist troops to Madrid in early November 1936 the government of Prime Minister Francisco Largo Caballero was restructured to include the anarchists Juan López Sánchez (Commerce), Joan Peiró (Industry), Federica Montseny (Health) and Juan García Oliver (Justice).

The committee continued to call for resistance, and demanded that anarchist leaders who had escaped to France when Catalonia fell should return to the central-south area.

He called for the CNT to take this position, then abandoned anarcho-syndicalism in favor of "all-powerful" trade unions that would replace political parties and rule in their place.

He attended the Congress of the Sindicato Vertical (Spanish Trade Union Organisation) in Tarragona in May 1968 as an observer, and defended the elimination of the CNT.

[2] He belonged to the Alianza Democrática Española (ADE, Spanish Democratic Alliance), as did Segismundo Casado and the socialist Wenceslao Carrillo, an organization that opposed the moderate Francoism inspired by Salvador de Madariaga.