| Oscar Massei | |
| Fullname: | Oscar Alberto Massei |
| Birth Date: | 29 September 1934 |
| Birth Place: | Pergamino, Argentina |
| Height: | 1.75 m |
| Position: | Midfielder |
| Years1: | 1952–1955 |
| Clubs1: | Rosario Central |
| Caps1: | 88 |
| Goals1: | 49 |
| Years2: | 1955–1958 |
| Clubs2: | Internazionale |
| Caps2: | 47 |
| Goals2: | 19 |
| Years3: | 1958–1959 |
| Clubs3: | Triestina |
| Caps3: | 22 |
| Goals3: | 2 |
| Years4: | 1959–1968 |
| Clubs4: | SPAL |
| Caps4: | 244 |
| Goals4: | 52 |
| Years5: | 1968–1969 |
| Clubs5: | Chiasso |
| Caps5: | 7 |
| Goals5: | 0 |
| Managerclubs1: | SPAL (youth) |
| Manageryears2: | 1968–1970 |
| Managerclubs2: | Trevigliese |
| Manageryears3: | 1970–1971 |
| Managerclubs3: | Treviso |
| Manageryears4: | 1971–1973 |
| Managerclubs4: | Messina |
| Manageryears5: | 1973–1974 |
| Managerclubs5: | Ignis Varese |
| Manageryears6: | 1974–1975 |
| Managerclubs6: | Milanese |
| Manageryears7: | 1975–1977 |
| Managerclubs7: | Lecco |
| Manageryears8: | 1977–1979 |
| Managerclubs8: | FC Lugano |
| Manageryears9: | 1979–1980 |
| Managerclubs9: | Lecco |
| Managerclubs10: | Pro Italia Galatina |
| Managerclubs11: | Pro Vercelli |
| Managerclubs12: | Vogherese |
Oscar Alberto Massei (born 29 September 1934) is an Argentine retired professional football player and coach. He also holds Italian citizenship.