Maputo - Businessman Armando Guebuza has pledged an "unrelenting fight against poverty" after being sworn in as Mozambique's president.
He replaces Joaquim Chissano who retired after 18 years in power.
Guebuza, from the ruling Frelimo party, took the oath of office in Maputo's Independence Square on Wednesday to loud cheers from about 50 000 supporters and applause from neighbouring African leaders.
Chissano's presidency saw the country transformed from one ravaged by civil war to an African success story.
But despite its vastly improved economic performance, about half of Mozambique's 18-million people still live in desperate conditions.