Heissler Rafael Guillent Ecker (born 17 December 1986) is a Venezuelan professional basketball player for Franca Basquetebol Clube and Venezuela.

In October 2019, Guillent signed with Astros de Jalisco in Mexico.

[3] In February 2021, Guillent signed with Guaiqueríes de Margarita in Venezuela.

[4] In September 2023, Guillent signed with Franca Basquetebol Clube in Brazil.

Guillent has been a member of the senior men's Venezuelan national basketball team.