The Leone I Cabinet was the 18th cabinet of the Italian Republic, which held office from 22 June 1963 to 5 December 1963, for a total of 166 days, or 5 months and 13 days.
It was also knowns as Bridge government (Governo ponte), as a transitional government awaiting the recomposition of the internal currents of the PSI (led respectively by Riccardo Lombardi and Pietro Nenni) and its entry into the cabinet.