The 26-year-old has extended his stay at Stamford Bridge until 2021 – having established himself as a regular in Antonio Conte’s squad this season.
''I feel very excited. I’m delighted to be here for another few years now and to sign a new deal,'' Moses told club website.
''Now it’s time to concentrate on the team and keep working hard to make sure we win games and try to win the Premier League this season.
''We’re having a great season, I’m enjoying my football and we have a good manager here that has given every single one of us confidence. I just want to keep on enjoying it and working hard for the team.’’
Moses arrived at Chelsea in 2012 from Wigan Athletic and enjoyed a solid first season at the club, helping them lift the Europa League trophy.
However, he spent the next three seasons on loan at Liverpool, Stoke City and West Ham United.
The Super Eagles’ forward has made 72 appearances for the Roman Army , 28 coming so far this season, scoring 14 goals.