The Syndicalist Party (Spanish: Partido Sindicalista; Catalan: Partit Sindicalista) was a left-wing political party in Spain, formed by Ángel Pestaña in 1932. Pestaña, a leading member of the Confederación Nacional del Trabajo (CNT) trade union, formed the party in response to the growing influence of the Iberian Anarchist Federation over the CNT. He and other notable members of the CNT had previously signed a Manifest dels Trenta ("Manifesto of the Thirty"), which had got them expelled.

The thesis of Ángel Pestaña was to contribute to the workers' movement by endowing it with a political party which, without interfering in their work, collaborated with the industrial unions, but with full autonomy. It differed from the PSOE-UGT pact in that it intended to avoid all subordination of union work to partisan political interests. Pestaña's libertarian possibilist tendency corresponded with the British Independent Labour Party, a representation of workers' interests in Parliament with a revolutionary purpose; that is, the achievement of libertarian communism with an organization based on the cooperatives, trade unions and municipalities.