The Samagi Jana Balawegaya decided to support the new government headed by Prime Minister Ranil Wickremesinghe without accepting ministerial portfolios.
The decision was made at the parliamentary group meeting of the party today.
However, the SJB said it would withdraw their support if attempts were made to poach individual MPs of the party.
With this latest development, Prime Minister Ranil Wickremesinghe has secured support from a number of parties in Parliament including the SLPP, the SJB and the SLFP