Pawar took oath as a member of the Upper House along with 13 others including Congress veteran Motilal Vora.
Besides Pawar, two others from Maharashtra - Murli Deora of Congress and Majeed Memon of NCP - also took oath as Rajya Sabha MPs.
Four members from Tamil Nadu elected to Rajya Sabha and two each from Assam and Chattisgarh also became Elders after taking oath.
Four AIADMK members S Muthukaruppan, Sasikala Pushpa, K Selvaraj and Vijila Sathyanath became MPs of the Upper House after taking oath.
BJP members Ram Narain Dudi from Rajasthan and Satyanarayan Jatiya from Madhya Pradesh along with Congress member Haji Abdul Salam from Manipur took oath as MPs of the Upper House.