Article 70 of the Constitution of Bangladesh pertains to the anti-defection law in the country. It was inserted into the Constitution in 1978 with the intention of discouraging political defections and promoting stable government formation.

Under Article 70, a member of Parliament (MP) who is elected on a political party's ticket will lose their seat if they voluntarily give up their party membership, vote against party directives on crucial matters, or join another political party. The provision aims to prevent MPs from changing their party allegiance for personal gain or to undermine the political stability of the government.

The anti-defection law in Bangladesh has been criticized by some for its potential impact on democratic principles, as it restricts the freedom of elected representatives to vote according to their conscience or in the interest of their constituents. Critics argue that it can stifle dissent and discourage independent thinking within political parties.