Facundo Gigena (born 15 September 1994) is an Argentine international rugby union player who plays in the prop position for Pau (Section Paloise).

He previously played for London Irish in England's Premiership Rugby.

[3] Gigena represented Argentina at both Under 18 and 19 level before being selected in the Under-20 sides which competed in the World Championships in 2013 and 2014.

[1] He made his senior international debut in a match against Chile in Santiago on June 4, 2016 and marked his first appearance with a try in an 87-12 victory for his side.

[5] He made his debut against Cardiff Blues in the Anglo-Welsh Cup on 27 January 2018.