External Affairs Minister Dr S Jaishankar took oath as Rajya Sabha member.
He has been elected to the Upper House from Gujarat.
Article 84 of the Constitution lays down the qualifications for membership of Parliament.
A 1977-batch Indian Foreign Service (IFS) officer, Subrahmanyam Jaishankar played a major role during the 2017 Doklam stand-off negotiations with China.
He was also involved in negotiating the landmark Indo-US Nuclear deal.