Mariano Stendardo (born 2 May 1983) is an Italian footballer who plays for the Serie D side Giugliano as a defender.

However, on 28 January 2005, Mariano moved to Atalanta in a co-ownership deal, for €2,000,[nb 1] while Guglielmo remained at Perugia before joining Lazio in summer 2005.

Atalanta acquired the full registration rights of Mariano in summer 2005 for free, after the bankruptcy of Perugia.

On 19 July 2015, he signed a 2-year deal with the Lega Pro newcomer Fidelis Andria.

This biographical article related to association football in Italy, about a defender born in the 1980s, is a stub.