Mechichi, an independent who served as interior minister in the outgoing government of Elyes Fakhfakh, will now replace his former boss in a handover ceremony on Thursday.
The new prime minister promises that his government will push for reforms, bolster public finances, crack down on tax evasion and invest in poor regions across the country.
Tunisia got its third government less than 12 months after Prime Minister Hichem Mechichi and his ministers were, on Wednesday, sworn in after winning a marathon confidence vote.
He is the eighth democratically elected prime minister in the last decade
The last Tunisian government was sworn in October 2019, but complaints by several political parties in the country that the Cabinet consisted of academics, public servants and experts rather than professional politicians necessitated a change.
The new Tunisian government, headed by 46-year-old Prime Minister Hichem Mechichi, was sworn in before President Kais Saied at the Carthage Palace outside Tunis on Wednesday.
The ceremony followed a marathon 15 hour confidence vote on Tuesday in which Mechichi and his 28 member Cabinet were confirmed by a vote of 134 to 67 with no abstentions.
Prime Minister Mechichi, whose government is the ninth since Tunisian protests ousted long-time President Zine El Abidine Ben Ali in 2011 and sparked the Arab Spring, said “ten years after the revolution, the dream of a new Tunisia that assures liberty, dignity and equality has transformed into disillusion, disappointment and despair, which has pushed a large number of Tunisians to take boats of death,” in a reference to the perilous journeys many have undertaken in an attempt to reach Europe.