The Pan-African Union for Social Democracy (French: Union panafricaine pour la démocratie sociale, UPADS) is a political party in the Republic of the Congo headed by Pascal Lissouba, who was President from 1992 to 1997. It has been the country's main opposition party since Lissouba's ouster in 1997. Pascal Tsaty-Mabiala has been Secretary-General of UPADS since 2006.