| Guilherme Rech | |
| Nationality: |  Brazilian |
| Birth Date: | 5 January 2001 |
| Birth Place: | Jaraguá, Goiás |
| Height: | 2.04abbr=onNaNabbr=on |
| Weight: | 92kg (203lb) |
| Position: | Middle blocker |
| Currentclub: | Sada Cruzeiro Vôlei |
| Currentnumber: | 6 |
| Years: | 2018–2019 2020–2021 2021– |
| Teams: | Lavras Vôlei Pacaembu Ribeirão Preto Sada Cruzeiro Vôlei |
Guilherme Rech (born 5 January 2001) is a Brazilian volleyball player who plays as a middle blocker.
Brazilian Super Cup:
FIVB Men's Club World Championship
Men's South American Club Championship
Brazilian Cup:
Boys' Youth South American Championship