| Club: | Milan |
| Season: | 1988–89 |
| Stadium: | San Siro |
| Chairman: | Silvio Berlusconi |
| Chrtitle: | President |
| Owner: | Silvio Berlusconi |
| Manager: | Arrigo Sacchi |
| League: | Serie A |
| League Result: | 3rd |
| Cup1: | Coppa Italia |
| Cup1 Result: | Group stage |
| Cup2: | European Cup |
| Cup2 Result: | Winners (in 1989-90 European Cup, European Super Cup and 1989 Intercontinental Cup) |
| Cup3: | Supercoppa Italiana |
| Cup3 Result: | Winners |
| League Topscorer: | Marco van Basten (19) |
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| European Cup Final | |
| Prevseason: | 1987–88 |
| Nextseason: | 1989–90 |
AC Milan won the European Cup thanks to a 4–0 victory against Steaua București, with Dutch duo Ruud Gullit and Marco van Basten scoring twice each.[1] It did not defend its Serie A title however, finishing 3rd in the standings. Milan also won the first Supercoppa Italiana, beating Sampdoria in the inaugural contest.
| In | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | from | width=35% | Type |
| MF | Frank Rijkaard | - | |||||
| FW | loan ended | ||||||
| GK | |||||||
| GK | |||||||
| MF | |||||||
| Out | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | To | width=35% | Type |
| GK | Daniele Limonta | Venezia | |||||
| GK | Giulio Nuciari | ||||||
| DF | loan | ||||||
| MF | - | ||||||
| MF | - | ||||||
| FW | loan | ||||||
| FW | loan | ||||||
| In | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | from | width=35% | Type |
| MF | Fabio Viviani | - | |||||
| Out | |||||||
|---|---|---|---|---|---|---|---|
| width=3% | Pos. | width=32% | Name | width=30% | To | width=35% | Type |
| FW | loan | ||||||
See main article: 1988–89 Serie A.
Pietro Paolo Virdis 10 Angelo Colombo 3 Alberigo Evani 3 Graziano Mannari 3See main article: 1988–89 Coppa Italia. First round- Group 3Second round- Group 1
See main article: 1988 Supercoppa Italiana.
See main article: 1988–89 European Cup.
See main article: 1989 European Cup Final.