Pascal Tsaty Mabiala is a Congolese politician who has been the Secretary-General of the Pan-African Union for Social Democracy (UPADS) since 2006, as well as President of the UPADS Parliamentary Group since 2007. He stood as the UPADS candidate in the 2016 presidential election.
In the June–July 1992 parliamentary election, Tsaty Mabiala was elected to the National Assembly as a UPADS candidate. After the election, the Congolese Labour Party (PCT) formed an alliance with the Union for Democratic Renewal (URD), and together the two held a parliamentary majority. On 24 September 1992, the National Assembly, controlled by the URD–PCT alliance, elected its Bureau; UPADS, as part of the parliamentary opposition, received two secondary posts in the seven-member Bureau, one of which went to Tsaty Mabiala, who was elected as Second Secretary of the National Assembly.
Acting on behalf of UPADS, Tsaty Mabiala signed the Code of Good Conduct between political parties of the majority and the opposition on 31 May 1997. The Code of Good Conduct was an agreement to disavow political violence, although it proved to be entirely futile, as a civil war broke out a few days later.
Shortly after the outbreak of the civil war on 5 June 1997, Tsaty Mabiala was included on the National Mediation Committee. In September 1997, Tsaty Mabiala, who was a leading member of UPADS, was appointed as Minister of National Defense in the government of Bernard Kolélas; this government was ousted after only one month when forces loyal to Denis Sassou Nguesso captured Brazzaville in mid-October 1997.
In 2006, Tsaty Mabiala was First Vice-President of the National Preparatory Commission for the UPADS Congress. At the party's first extraordinary congress, held on 27–28 December 2006, Tsaty Mabiala was elected as the Secretary-General of UPADS. He was subsequently elected to the National Assembly in the June–August 2007 parliamentary election as the UPADS candidate in the Loudima constituency of Bouenza Region. Following that election, he became President of the UPADS Parliamentary Group when the National Assembly began meeting for the new parliamentary term in September 2007.