Roberto Mancini's men have announced the two-year loan signing of the Italy international, who spoke of his delight at joining the club.
Inter has completed the signing of Eder from Sampdoria on a two-year loan deal with an option to make the move permanent.
Roberto Mancini previously already admitted Inter was keen to lure the 29-year-old away from Sampdoria, but claimed at the time a transfer in January could be problematic.
However, the San Siro side has now managed to capture the Italy international after all, with Eder signing a contract with Inter until June 2020, which will become valid once the club exercises its option to buy.