Antonio Segni (Sassari2 February 1891 – Rome december 1, 1972) was an Italian politician. From 1955 to 1957 and from 1959 to 1960 he was Prime Minister of Italy.From 1962 to 1964 he was president.

Antonio Segni studied agricultural and commercial law and was Professor of PaviaCagliarito Sassari , and Rome.

After the first world war he joined the Partito Popolare Italiano of Don Luigi Sturzo. This party was banned by Mussolini in 1926. In 1944 he became a member of theDemocrazia Cristiana, the Italian Christian Democratic party.

From 1946 to 1950 was Segni Minister of agriculture in the Cabinet ofAlcide De Gasperi and then Minister of education until 1953 in theAlcide De Gasperi cabinets-and-Pella.

In June 1955 he formed the seventeenth post-war cabinet with Christian DemocratsLiberals and Socialists. This Government fell in may 1960, when the Social DemocratGiuseppe Saragat, the Foreign Minister, stepped out of the Government.

In the Cabinet of Amintore Fanfani (1958-1959) was Segni Deputy Prime Minister and Defence Minister. On February 15, 1959 he was again premier, now of a single cabinet which only joined the Democrazia Cristiana. A year later, on 24 February 1960 came across this Government. from 1960 to 1963 was Segni Minister of Foreign Affairs.

On 11 may 1962 he accepted the Presidency of Italy, but he has performed already in 1964 for health reasons.

Segni belonged in the Christian Democratic Party to the opponents of a coalition Government with the Socialists (PSI) and the social-democrats (PDSI).