See main article: South American Rugby Championship.
| 2° Sudamericano de Rugby | |
| Countries: | |
| Host: | Chile |
| Champion: | Argentina |
| Runnerup: | Chile |
| Matches: | 6 |
| Preceded By: | 1951 |
| Succeeded By: | 1961 |
The 1958 South American Rugby Championship was the second edition of the two tiered competition of the leading national Rugby Union teams in South America. The tournament was arranged seven years after the "Torneo Internacional played in 1951, and later recognized as the first edition of this competition.
The tournament was played in Chile and 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 | 108 | 3 | +105 | 6 | ||||||||||
| 3 | 2 | 0 | 1 | 65 | 26 | +39 | 4 | ||||||||||
| 3 | 1 | 0 | 2 | 22 | 90 | −68 | 2 | ||||||||||
| 3 | 0 | 0 | 3 | 9 | 85 | −76 | 0 |
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