Marcelo Loffreda is an Argentine former rugby player and coach. Loffreda won 44 caps with one as captain, playing at centre for the Argentine rugby union side . He played much of his career outside the legendary Hugo Porta and scored 4 test tries.

In 1994 he hung up his playing boots and became a coach. In April 2000, he was appointed coach of Argentina and steered them to series victories over France, Wales and Scotland, a draw with the British and Irish Lions, a win against England at Twickenham in November 2006 and Bronze medal position in the Rugby World Cup of 2007.