Workers and Peasants' Bloc

The Workers and Peasants' Bloc (Catalan: Bloc Obrer i Camperol; Spanish: Bloque Obrero y Campesino, BOC) was a "Right Opposition" communist group in Spain, centered in Catalonia.

Prominent leaders of BOC were Joaquín Maurín, Hilari Arlandis, Jordi Arquer, Pere Bonet, Víctor Colomer, Abelard Tona Nadalmai and Àngel Estivill.

In November 1935, the majority of BOC merged with the Trotskyist Communist Left of Spain, to form the Workers' Party of Marxist Unification (POUM; Catalan: Partit Obrer d'Unificació Marxista).

The minority stayed out of the merger and later joined the Unified Socialist Party of Catalonia (PSUC).

BOC also published L'Hora and El Front in Barcelona, L'Espurna in Girona and Avant in Lleida.