Alda Bandeira Tavares Vaz da Conceição (born September 22, 1949) is a politician in São Tomé and Príncipe.
Bandeira was born in Santana, São Tomé in 1949. Her father was a nurse. She studied modern languages at Eduardo Mondlane University in Maputo, Mozambique, received an MA in modern languages and literature from Lisbon University, and studied international relations at the Lisbon Instituto Superior de Ciências Sociais e Políticas. Bandeira taught in secondary schools in Maputo and São Tomé between 1975 and 1982.
Bandeira began her political career as the director of multilateral cooperation in the Ministry of Foreign Affairs, a position she held from 1987 to 1990. She also served as national coordinator for US African Development Foundation programs in São Tomé from 1988 to 1990.