Juan Antonio Flecha Giannoni (born 17 September 1977) is an Argentine-born Spanish former professional road bicycle racer, who competed as a professional between 2000 and 2013.
Flecha had a reputation of being a Classics specialist and to ride with an aggressive style as he was keen on participating in breakaways.
His major victories include winning a stage of the 2003 Tour de France, successes at the two defunct classics ZĂĽri-Metzgete and Giro del Lazio in 2004, and the Omloop Het Nieuwsblad in 2010.
He was also known for his numerous high placings in important one-day races, most notably Paris–Roubaix, where he finished in the top ten eight times without registering the victory.
In the Grand Tours, he was often assigned to a role of domestique.