<P> Dr. Sachchidananda Sinha was the first chairman ( temporary ) of Constituent Assembly . Later Dr. Rajendra Prasad was elected as the president and Its vice-president was Harendra Coomar Mookerjee , a Christian from Bengal and former vice-chancellor of Calcutta University . Also chairing the assembly 's Minorities Committee , Mookerjee was appointed governor of West Bengal after India became a republic . Jurist B.N. Rau was appointed constitutional adviser to the assembly ; Rau prepared the original draft of the constitution , and was later appointed a judge in the Permanent Court of International Justice in The Hague . </P>
who was the first president of the constituent assembly
Dr. Rajendra Prasad