| Rafael Knief | |
| Fullname: | Rafael Reis Kneif |
| Birth Date: | 25 April 1992 |
| Birth Place: | Sorocaba, Brazil |
| Height: | 1.74m |
| Position: | Defender |
| Youthclubs1: | Corinthians |
| Youthclubs2: | Flamengo |
| Youthyears3: | 2011 |
| Youthclubs3: | Coritiba |
| Years1: | 2012–2013 |
| Clubs1: | Junior Team |
| Years2: | 2013 |
| Clubs2: | Carrarese |
| Years3: | 2015 |
| Clubs3: | Ceahlăul Piatra Neamț |
| Caps3: | 14 |
| Goals3: | 0 |
Rafael Reis Kneif (born 24 April 1992 in Sorocaba) is a Brazilian footballer who plays as a defender.
He also holds Portuguese citizenship.
On 23 February 2015, Kneif made his professional debut with Ceahlăul Piatra Neamț in a 2014–15 Liga I match against CFR Cluj.[1]