Walter Daniel Erviti Roldán (born 12 June 1980) is an Argentine football manager and former player who played mainly as a deep-lying playmaker.

Erviti began his playing career in 1998 with San Lorenzo de Almagro, where he was part of the squad that won the Clausura 2001 championship.

In 2008 Erviti returned to Argentina to play for Banfield, and was a key player in squad that won the Argentine championship for the first time in the history of the club, featuring in every game of the Apertura 2009 championship season.

On January 31, 2011, Erviti left Banfield and signed a three-year contract with Boca Juniors, that paid US$3.2 million for his transfer.

Erviti made his international debut for the Argentina national team on 26 January 2010 at the age of 29 in a 3–2 win in a friendly match against Costa Rica.