Khehar was administered the oath of office by President Pranab Mukherjee at Rashtrapati Bhavan here.
He succeeded Justice Tirath Singh Thakur. Khehar is the 44th CJI and also the first Sikh to hold the apex office.
He would have a tenure of little over seven months.
Khehar was the author of the judgment by a five-judge constitution bench that held “unconstitutional” the Constitution’s 99th amendment paving way for the National Judicial Appointment Commission and the National Judicial Appointment Commission Act, 2014.