1965–66 Inter Milan season

During 1965–66, Football Club Internazionale competed in Serie A, Coppa Italia and the European Cup.

Summary
After winning the European Cup last season, the club made just a few transfers in to the team, such as young players Cordova and Facco, also Cappellini back to the squad. Manager Herrera confirmed Grande Inter, with a substantial change: defender Facchetti moved to the left back and made numerous contributions in attacking, notably his capacity to finish and scoring goals. Facchetti held the record for most goals in a single Serie A season by a defender, with ten goals scored during this season, until it was broken by Perugia's Marco Materazzi during the 2000–01 season.

The team also won the 1965 Intercontinental Cup against Independiente de Avellaneda. The first leg was held on 8 September at San Siro, and Inter won the match 3–0, with goals from Joaquín Peiró and Sandro Mazzola. La Doble Visera hosted the return leg seven days later on 15 September 1965, and ended in a goalless draw. Internazionale thus won the Intercontinental Cup for the second year in a row.

The title holders advanced to the semi-finals in European Cup, where lost to Real Madrid with a 1–3 score after two legs.