FRODEBU is a political party founded by Melchior Ndadaye and his near collaborators with the purpose of setting up democracy in Burundi, in central Africa. June 1993 pluralist and democratic elections were won by this party which was then led by Melchior Ndadaye himself, who became the first Burundi democratically elected President, and who was killed in a military coup attempt on October 21, 1993, after three months only on power. During the 1993 electoral campaign, masses had been extremely enthusiastic, with a strong hope in a peaceful and prosperous new Burundi promised by Ndadaye. This research paper whose title is "The Social Representativeness of FRODEBU Political Party in Burundi from 1993 to 2020 through Legislative Elections" has been produced with the aim of showing the rate of the social representativeness of FRODEBU political party in Burundi from 1993 to 2020 through legislative elections. Its main research question was as follows: "What is the size of the social representativeness of FRODEBU political party through legislative elections held in Burundi from 1993 to 2020?" In order to answer this question, the researcher has used ICT first: Much information has been collected thanks to Internet. The reading of physical books and journals has also been useful. Another method which has been used was interview with informed people, notably some teachers of primary and secondary schools who work in Ngozi town in Burundi. Throughout this research, and through the results of legislative elections held in Burundi from 1993 to 2020, it has been shown that the social representativeness of FRODEBU political party is declining in this way: 72.