During a closed session of a summit in Yangon, 125 members of the National League for Democracy voted to choose their next leader, CNN reported.
Nobel Peace Prize laureate Suu Kyi was re-elected, CNN said, but the exact vote was not immediately released..
The vote was part of the first conference of opposition members in 25 years -- decades of authoritarian military rule previously would not allow such meetings.
A number of members of the National League for Democracy were imprisoned under the military junta and Suu Kyi was under house arrest for years before authorities released her in 2011.
Notable deaths of 2014 [PHOTOS]