Tamil Nadu Forward Bloc was a political party in Tamil Nadu, India.
The party was founded in 1981 through the merger of National Forward Bloc (NFB) and Pasumpon Forward Bloc of Ayyanan Ambalam, following a split from the NFB.
In 1983, the party suffered a severe split.
Muthuramalinga Thevar and formed the Democratic Forward Bloc.
The rump TNFB was led by Ayyanan Ambalam.