Guillermo Falasca Fernández (born October 24, 1977) is a Spanish volleyball player and coach born in Argentina.

Falasca became topscorer and best server at the 2005 European League, in which Spain ended up in third place in the overall-rankings.

And he was a member of South Korean Gumi LIG Insurance Greaters in the V-League 2007–08 season.

A resident of Málaga he was a member of the Men's National Team that won the 2007 European title in Moscow, Russia.

This biographical article relating to volleyball in Spain is a stub.