Movement for the Unity of the Communists (in Portuguese: Movimento pela Unidade dos Comunistas) was a splinter group of the Brazilian Communist Party (PCB). MUC split from PCB on April 19, 2005, after the departure of PCB from the Lula government. On May 15 the same year, the 53 members of MUC decided to merge into the Communist Party of Brazil (PCdoB).