| Marcel de Souza | |
| Height Ft: | 6 |
| Height In: | 6.5 |
| Weight Lb: | 210 |
| Birth Date: | 4 December 1956 |
| Birth Place: | Campinas, Brazil |
| Career Position: | Shooting guard / small forward |
| Highlights: |
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Marcel Ramon Ponickwar de Souza, commonly known as Marcel de Souza, or simply Marcel (born December 4, 1956, in Campinas), is a retired Brazilian professional basketball player and a professional coach.
During his pro club career, de Souza won the 1979 edition of the FIBA Intercontinental Cup, while a member of EC SÃrio.
De Souza played at 5 FIBA World Cups: (1974, 1978, 1982, 1986, and 1990). He totaled 37 games played and 494 points scored during those competitions, and he won a bronze medal at the 1978 tournament. De Souza also played with Brazil at the Summer Olympic Games of 1980, 1984, 1988, and 1992.
De Souza is the older brother of Maury de Souza, who is also a Brazilian former professional basketball player. De Souza is also the father-in-law of Brazilian professional basketball player Guilherme Giovannoni.