| Club: | Football Club Internazionale |
| Season: | 1964–1965 |
| Stadium: | San Siro |
| Chairman: | Angelo Moratti |
| Manager: | Helenio Herrera |
| League: | Serie A |
| League Result: | 1st |
| Cup1: | European Cup |
| Cup1 Result: | Winners |
| Cup2: | Intercontinental Cup |
| Cup2 Result: | Winners |
| Cup3: | Coppa Italia |
| Cup3 Result: | Runners-up |
| League Topscorer: | Mazzola (17) |
| Season Topscorer: | Mazzola (21) |
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| Prevseason: | 1963–64 |
| Nextseason: | 1965–66 |
Due to the European achievement in 1963–64 season, Inter also debuted in the Intercontinental Cup facing off with Independiente. After two legs, the aggregate score resulted in a draw; the cup was awarded by a tie-breaker, in which Inter won 1–0 at extra time.
In Serie A Inter suffered a 3–0 loss in the Derby della Madonnina.[1] In late January, there were two draws in row and an uprising defeat, by Foggia in matchday 19. So, in the middle of the season, Milan had 7 points over Inter with 15 games to play. The following months saw a historical comeback from the side, that won 13 times and drew twice: 28 points were earned this way, resulting in first place. Mazzola had a central role in team play, scoring 17 goals to be the league's top-scorer.
On May 27, a year on exactly from the previous win, Inter retained the European title by beating Benfica at the San Siro: Jair was the scorer.
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See main article: 1964-65 Coppa Italia.
See main article: 1965 Coppa Italia Final.
See main article: 1964-65 European Cup.
See main article: 1965 European Cup Final.
See main article: 1964 Intercontinental Cup.
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