María Belén Simari Birkner (born 18 August 1982) is a female skier from Argentina. She has represented Argentina in both the 2006 and the 2010 Winter Olympics, in the Alpine skiing events. She also took part in the 2005 Alpine Skiing World Cup, where she came 20th in the Women's Combined, and in the FIS Alpine World Ski Championships 2009. She is the sister of fellow alpine skiers Cristian Simari Birkner and Macarena Simari Birkner.