Monja Roindefo Zafitsimivalo (born 1965) is a Malagasy politician who was Prime Minister of Madagascar from March 2009 to October 2009.

[2] Following the August 2009 power-sharing agreement signed in Maputo, Andry Rajoelina reappointed Monja Roindefo as prime minister on 5 September 2009, despite opposition objections.

The Southern African Development Community (SADC) said that it "firmly rejects and condemns" Rajoelina's reappointment of Monja Roindefo and the appointment of a new government without opposition approval.

He stressed that the faction leaders had not signed the agreement and said that his government could not be removed by international mediators; he also said that he would stand as a presidential candidate "if the rules of the game are clearly defined".

[8] Monja Roindefo took the matter to the Council of State on 12 October 2009, requesting that it annul the decree appointing Eugene Mangalaza; he argued that the procedure was flawed and that the faction leaders needed to sign the agreement in order for it to become valid.