The Bloc of Communists and Socialists (Romanian: Blocul Comuniștilor și Socialiștilor, BCS), previously known as the Electoral Bloc of Communists and Socialists (Romanian: Blocul electoral al Comuniștilor și Socialiștilor; BECS), is a communist and democratic socialist political alliance in Moldova formed in May ahead of the 2021 Moldovan parliamentary election.

[2] Talks about the formation of a pre-election coalition were launched by the representatives of the PSRM in April 2021.

In early May, Igor Dodon sent a proposal to the PCRM president Vladimir Voronin to form an electoral coalition.

[3] The Central Committee of the PCRM approved by a majority the formation of an electoral coalition on 11 May,[4] the PSRM announced and a day later that they are willing to sign the protocol for the formation of the coalition.

The alliance is anti-NATO, Russophilic, and opposes the unification of Moldova and Romania.