María Susana Rivadeneira Simbal (born 8 September 1979 in Quito) is an Ecuadorian model, painter and beauty queen who won Miss Ecuador 2004 and Top 10 finalist at Miss Universe 2004.
Rivadeneira represented Ecuador in the 2004 Miss Universe pageant that took place in Quito, placing among the Top 10 finalists. The winner was Jennifer Hawkins of Australia.
Nowadays, Rivadeneira works for a non-profit organization called Fundación Familia y Futuro which helps children from the poorest neighbourhoods of Guayaquil. She also continues her work as a model and painter.