The Rossoneri have picked up the former Cagliari keeper on a free transfer after his contract at Chievo came to an end
The 29-year-old's brief stay at the Marc'Antonio Bentegodi ended at the end of the season and the San Siro outfit have pounced, signing him on a free transfer.
"AC Milan announce the they have signed Michael Agazzi, who has signed a contract expiring on June 30, 2017," a club statement read.
Agazzi began his professional career at South Tyrol and made over 100 league appearances for Cagliari but is likely to play back-up to Christian Abbiati, who extended his contract earlier this week.
The current second-choice keeper, Marco Amelia, is likely to leave the club this summer.