Members of the German Social Democratic Party supported the coalition agreement with the German Christian Democrats, world agencies reported, citing a statement from the party, BTA reported.
In this way, the last obstacle to forming a new government in Germany is removed.
The Christian Democrats won the early parliamentary elections in February, and the Social Democrats remained in third place. The far-right Alternative for Germany (AfD) came in second, but both the Christian Democrats and the Social Democrats refused to form a coalition with the party in a future government.
The approved coalition agreement allows Christian Democrat leader Friedrich Merz to become chancellor on May 6.
The results of the Social Democrat party vote showed that 84 percent of party members supported the coalition deal. 56 percent of the 360,000 party members took part in the vote.
At the same time, sources within the Social Democrat ranks said that Lars Klingbeil, who is one of the party leaders, will be Germany's next vice chancellor. Klingbeil, 47, established a close relationship with Christian Democrat leader Merz during coalition government talks that began after the February elections, DPA reported.