File Photo: Andrea Belotti after netting during the shootout as Italy beat Spain in the Euro semi-final. AFP
In a statement Roma said that the Italy striker had signed an initial one-year contract that runs until 30 June 2023".
"As part of the overall agreement there is also the option for an additional two-year extension, based on certain performance-related criteria," Roma added.
Belotti had been without a club after ending a seven-year spell at Torino, where he scored 100 Serie A goals, at the end of last season.
He arrives after Ghanaian attacker Felix Afena-Gyan's move to Cremonese and will back up Roma's starting centre-forward Tammy Abraham.
The 28-year-old has 44 caps for his country, netting 12 times and featuring in the Azzurri's Euro 2020 triumph last summer.
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