Tunisian Social Solidarity Union is the main non-governmental organisation striving for the development of the feeling of solidarity and mutual aid. It is carrying out social and relief aid, self-development in favour of the deprived. TSSU is ruled by the low of associations N° 154 of 1959 as amended in 1988 and 1992. On December the 17th 1988, the TSSU replaced the National Committee for Social Solidarity.

Founded in 1964, it benefits since the political change in 1987 with a constant care to reinforce its structures, extend its network, grow its resources and intensify its action.