Zita Maria de Seabra Roseiro (born Coimbra, Santa Cruz, May 25, 1949) is a Portuguese politician.
Zita Seabra joined the Portuguese Communist Party in 1966, before she was eighteen years old and was controller of the UEC (in Portuguese: União dos Estudantes Comunistas - Communist Student Union) before and after the Carnation Revolution. As a member of the Communist Party, she was elected to and served in the Portuguese parliament, representing Lisbon and Aveiro between 1980 and 1987. She was elected to the Political Commission of the party at its 10th Congress in 1983. In 1982 she was responsible for introducing in parliament for the first time a bill to legalize abortion, and helped create the Ecologist Party "The Greens" (Partido Ecologista "Os Verdes", PEV).
She abandoned the Communist Party shortly before the fall of the Soviet Union, and is currently one of the most widely known party dissidents. Due to her criticisms of the party, she was expelled from its Political Committee in 1988, and then purged from the party's Central Committee. In 1988 she published the book The Name of Things: Reflections During Times of Change which went through seven printings by the following year. In 1989 she traveled to Russia to cover its first free elections for the Expresso newspaper. During the visit, she was struck by the contrast between what she had read about the country in its propaganda as a workers' paradise and what she observed. She was expelled from the party in 1990.
After publicly renouncing communism, she joined the Social Democratic Party (PSD). She was Vice-President of the Parliamentary Group of the Social Democratic Party. She also became opposed to legalized abortion.