Monja Roindefo Zafitsimivalo (born 1965) is a Malagasy politician who was Prime Minister of Madagascar from March 2009 to October 2009. He was appointed on 7 February 2009 by opposition leader Andry Rajoelina at the head of Rajoelina's rival government; later, on 17 March, Andry Rajoelina was installed in power by the military, and Monja Roindefo officially took over as Prime Minister.