| Alfeu Martha de Freitas | |
| Fullname: | Alfeu Martha de Freitas |
| Birth Date: | 24 August 1936 |
| Birth Place: | Montenegro, Rio Grande do Sul, Brazil |
| Position: | Midfielder |
| Years1: | 1956–1957 |
| Clubs1: | Aimoré |
| Years2: | 1958 |
| Clubs2: | Portuguesa |
| Years3: | 1959–1962 |
| Clubs3: | Internacional |
| Years4: | 1963–1964 |
| Clubs4: | San Lorenzo |
| Years5: | 1964 |
| Clubs5: | Grêmio |
Alfeu Martha de Freitas (born August 24, 1936 in Montenegro, Rio Grande do Sul), known as just Alfeu, was a Brazilian football (soccer) player, who played as a midfielder and played in clubs of Brazil and Argentina.