Lobsang Sangay was sworn in Monday as the new prime minister of Tibetan government in exile at a ceremony presided over by the Dalai Lama in the temple Tsuglagkhang in the Indian city of Dharamsala, where the government is based.
The lawyer of 43 years has vowed to free his people of "Chinese colonialism".
Lobsang Sangay, however, reaffirmed its support for the formula required by the Dalai Lama for a "meaningful autonomy" of Tibet under Chinese administration, rather than outright independence for the region.
Mr. Sangay, a graduate of the Faculty of Law, Harvard University, was elected in late April among two other candidates.
Last May, the Dalai Lama officially ended its political role after clearly indicated in March that it was time that a leader "freely elected" succeeded him.
Dr. Sangay has never lived in Tibet and there is not never even made. The executive in exile which he took command not recognized by any foreign government.
After the ceremony, Mr. Sangay admitted he was unlikely to have direct contacts with Beijing, which is willing to negotiate with the envoys of the Dalai Lama.