Gustavo Tsuboi (born 31 May 1985) is a table tennis player from Brazil, he won three medals in double and team events in the Pan American Games.

[4] Tsuboi won the gold medal at the inaugural 2011 Latin American Cup held in Rio de Janeiro, Brazil after defeating Paraguay's Marcelo Aguirre 4–0.

[12][13] At the 2018 World Team Table Tennis Championships, Tsuboi reached the quarterfinals playing with Hugo Calderano and Eric Jouti.

[14] At the WTT Star Contender in Doha, held in March 2021, Tsuboi reached the round of 16 after defeating the Japanese Koki Niwa (17th).

[17] In 2017, the duo Tsuboi / Calderano was the 3rd best in the world rankings, behind only the Japanese Masataka Morizono and Yuya Oshima and the Chinese Xu Xin and Zhang Jike.