See main article: South American Rugby Championship.
| 4° Sudamericano de Rugby | |
| Countries: | |
| Date: | 16–20 August 1964 |
| Host: | Brazil |
| Champion: | Argentina |
| Runnerup: | Brazil |
| Matches: | 6 |
| Preceded By: | 1961 |
| Succeeded By: | 1967 |
The 1964 South American Rugby Championship was the fourth edition of the competition of the leading national Rugby Union teams in South America.
The tournament was played in São Paulo, Brazil and was won by Argentina.
| width=165 | Team | width=40 | Played | width=40 | Won | width=40 | Drawn | width=40 | Lost | width=40 | For | width=40 | Against | width=40 | Difference | width=40 | Pts |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 3 | 0 | 0 | 85 | 22 | +63 | 6 | ||||||||||
| 3 | 1 | 1 | 1 | 39 | 54 | −15 | 3 | ||||||||||
| 3 | 1 | 0 | 2 | 29 | 48 | −19 | 2 | ||||||||||
| 3 | 0 | 1 | 3 | 32 | 61 | −29 | 1 |
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