Eder has signed a new four-year contract with Inter Milan.
The 30-year-old forward has scored nine Serie A goals since joining Inter from Sampdoria in January 2016.
"FC Internazionale Milano is very pleased to announce that Eder Citadin Martins will remain a Nerazzurri player until June 30, 2021," a statement published on Inter's official website read.
"Inter and Eder, a story in black and blue that will continue!"
Italy international Eder has scored 11 goals in 63 appearances across all competitions for Inter.