| Roger De Cnijf | |
| Birth Date: | 14 April 1956 |
| Birth Place: | Leuven, Belgium |
| Currentteam: | Retired |
| Discipline: | Road |
| Role: | Rider |
| Proyears1: | 1979–1980 |
| Proyears2: | 1981 |
| Proteam2: | Boston–Mavic |
| Proyears3: | 1982 |
| Proyears4: | 1983 |
| Proyears5: | 1984 |
| Proyears6: | 1985 |
| Proyears7: | 1986 |
| Proteam7: | Transvemij–Van Schilt |
Roger De Cnijf (born 14 April 1956) is a Belgian former professional racing cyclist.[1] He rode in three editions of the Tour de France and one edition of the Vuelta a España. His most notable win was stage 4 of the 1979 Vuelta a España.