| Height: | 182 cm |
| Weight: | 62 kg |
| Sport: | Taekwondo |
| Club: | Brazilian Navy |
| Show-Medals: | yes |
Guilherme Dias Alves (born 27 July 1992) is a taekwondo competitor from Brazil. He won a bronze medal in the 58 kg division at the 2013 World Championships. He also won a gold medal in the 2015 Military World Games in Mungyeong.