Gustavo Marcaccio (born 3 May 1977) is an Argentine tennis coach and former professional player.

His best win came at the Prostějov Challenger in 2005, when he upset world number 20 Dominik Hrbatý in the first round.

At ATP Tour level, Marcaccio had main draw wins over Luis Horna and Tomáš Zíb.

Marcaccio has had stints coaching his countrymen Guido Pella, Juan Mónaco and Máximo González.

He was coach of Mónaco during his most successful season in 2012, when he won four ATP Tour titles, including the German Open, to break into the world's top 10.