The Legislature I of Italy (Italian: I Legislatura della Repubblica Italiana) was the 1st legislature of the Italian Republic, and lasted from 8 May 1948 until 24 June 1953.^[1][2] Its composition was the one resulting from the general election of 18 April 1948.

In the 1948 general election Christian Democracy (DC) went on to win a decisive victory with the support of the Catholic Church and obtained 48.5% of the vote, defeating the leftist social-communist alliance of the Popular Democratic Front (FDP). Despite his party's absolute majority in the Italian Parliament, Prime Minister Alcide De Gasperi continued to govern at the head of the centrist coalition, which was successively abandoned by the Italian Liberal Party (PLI) in 1950 and by the Socialist Party of Italian Workers (PSLI) in 1951.

Under De Gasperi, the first republican Parliament carried out major land reforms to help the poorer rural regions in the early postwar years, with farms appropriated from the large landowners and parcelled out to the peasants. In addition, the Parliament passed a number of laws safeguarding employees from exploitation, established a national health service, and initiated low-cost housing in Italy’s major cities.^[3] Here's a list of the main laws approved by the Parliament:

• Law 28 February 1949, n. 43 – "Measures to increase workers' employment, facilitating the construction of houses for workers". The law, also known as Fanfani house program, was promoted by the Minister of Labour Amintore Fanfani and launched a seven-year plan for popular housing to increase the stock of economic housing by means of construction or purchase of economic accommodation. The law also established a special housing fund, the so-called "INA-Casa", within the National Institute for Insurance.
• Law 10 August 1950, n. 646 – "Establishment of the Fund for extraordinary works of public interest in Southern Italy". The law established the Cassa per il Mezzogiorno (Fund for the South) to encourage the development of public works and infrastructure (roads, bridges, hydroelectric and irrigation) projects, and to provide credit subsidies and tax advantages to promote investments in the poor and mainly agricultural regions of Southern Italy.
• Law 21 October 1950, n. 841 – "Rules for expropriation, reclamation, transformation and assignment of land to peasants", also known as the "Agrarian Reform". The law promoted the redistribution of lands to peasants in the poorer rural regions and the formation of agricultural cooperatives.
• Law 24 February 1951, n. 84 – "Rules for the election of municipal councils". The reform changed the electoral law used for the election of the municipal councils, introducing a block voting system and abolishing the proportional representation.
• Law 31 March 1953, n. 87 – "Amendments to the law for the election of the Chamber of Deputies", also known as Scam Law.

The end of the legislature was characterized by some controversial changes in the electoral law proposed by the government. Even if the general structure remained uncorrupted, the government introduced a superbonus of two thirds of seats in the Chamber of Deputies for the coalition which would obtain at-large the absolute majority of votes. The change was hugely opposed by the opposition parties as well as the smaller DC coalition partners, which had no realistic chances of success. The new law was called Scam Law by its detractors,^[4] including some dissidents of minor government parties who founded special opposition groups to deny the artificial landslide to the DC.

• Giovanni Gronchi as President of the Chamber of Deputies in 1948
• President Luigi Einaudi inaugural address on 12 May 1948
• Prime Minister De Gasperi with ministers Pacciardi and Scelba in front of the Chamber of Deputies (1948)