| Arnaldo | |
| Fullname: | Arnaldo José da Silva |
| Birth Date: | 1 February 1944 |
| Birth Place: | Bissau, Guinea |
| Death Place: | Portugal |
| Height: | 1.78 m |
| Position: | Midfielder |
| Youthclubs1: | Balantas |
| Years1: | 1963–1976 |
| Caps1: | 236 |
| Goals1: | 45 |
| Years2: | 1965–1966 |
| Clubs2: | → Vilanovense (loan) |
| Years3: | 1966–1967 |
| Clubs3: | → Leixões (loan) |
| Caps3: | 20 |
| Goals3: | 1 |
| Years4: | 1967–1968 |
| Clubs4: | → Riopele (loan) |
| Years5: | 1976–1977 |
| Caps5: | 28 |
| Goals5: | 1 |
| Years6: | 1977–1979 |
| Caps6: | 29 |
| Goals6: | 8 |
| Years7: | 1979–1981 |
| Caps7: | 63 |
| Goals7: | 18 |
| Years8: | 1981–1982 |
| Caps8: | 26 |
| Goals8: | 5 |
| Years9: | 1982–1983 |
| Years10: | 1983–1984 |
| Years11: | 1984–1986 |
| Years12: | 1986–1987 |
| Clubs12: | Vilafradense |
| Totalcaps: | 402 |
| Totalgoals: | 78 |
| Nationalyears1: | 1973 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 1 |
| Nationalyears2: | 1974 |
| Nationalcaps2: | 1 |
| Nationalgoals2: | 0 |
Arnaldo José da Silva (1 February 1944 – 24 May 1999), known simply as Arnaldo, was a Portuguese footballer who played as an attacking midfielder.