Former IEBC chair Mohammed Issack Hassan officially handed over the office to Wafula Chebukati on Friday evening.
This is after Chebukati was sworn in by Chief Justice David Maraga following his approval by the national assembly.
Hassan has been in office since November 2011 with the Interim Independent Electoral and Boundaries Commission.
Chebukati and other six commissioners were sworn into on Friday.
The new team has a hard task of oversee the crucial 2017 general election.