The Provisional Government of Bangladesh, popularly known as the Mujibnagar Government ; also known as the Bangladeshi government-in-exile, was a provisional government that was established following the proclamation of independence of East Pakistan as Bangladesh on 10 April 1971. Headed by prime minister Tajuddin Ahmad, it was the supreme leadership of the Bangladeshi liberation movement, comprising a cabinet, a diplomatic corps, an assembly, an armed force, and a radio service. It operated as a government-in-exile from Kolkata.

The independence of Bangladesh was declared on 26 March 1971, at the onset of the Bangladesh Liberation War by Bangabandhu Sheikh Mujibur Rahman; the following day the declaration was broadcast by Major Ziaur Rahman from Swadhin Bangla Betar Kendra radio station in kalurghat, Chattogram. On 10 April, the Provisional Government of Bangladesh issued a proclamation on the basis of the previous declaration and established an interim constitution for the independence movement.