| Marcelinho | |
| Fullname: | Marcelo Santos Oliveira |
| Birth Date: | 9 March 1981 |
| Birth Place: | Aracaju, Brazil |
| Height: | 1.73 m |
| Position: | Attacking midfielder |
| Youthyears1: | 2000–2001 |
| Years1: | 2002–2003 |
| Clubs1: | Camaçari |
| Years2: | 2004 |
| Clubs2: | Catuense |
| Years3: | 2005–2006 |
| Clubs3: | Confiança |
| Caps3: | 12 |
| Goals3: | 8 |
| Years4: | 2007 |
| Clubs4: | → Vasco da Gama (loan) |
| Caps4: | 16 |
| Goals4: | 2 |
| Years5: | 2008 |
| Clubs5: | Villa Rio |
| Years6: | 2008 |
| Clubs6: | → Botafogo (loan) |
| Years7: | 2009 |
| Clubs7: | → América-RN (loan) |
| Years8: | 2010 |
| Clubs8: | → Rio Branco (loan) |
| Caps8: | 6 |
| Goals8: | 0 |
| Years9: | 2010–2011 |
| Clubs9: | Joinville |
| Caps9: | 11 |
| Goals9: | 0 |
| Years10: | 2012– |
Marcelo Santos Oliveira or simply Marcelinho (born 9 March 1981), is a Brazilian footballer who plays as an attacking midfielder.