Olivier Giroud, Laurent Koscielny and Francis Coquelin have all agreed new contracts with Arsenal, the club announced on Thursday.
Giroud's contract was set to expire in June 2018, while Koscielny and Coquelin were originally tied to the club for a further year, but all three have signed new "long-term contracts".
Manager Arsene Wenger said in a statement: "We are very pleased that three important members of our team have committed to us for the long term.
"Francis has made tremendous technical strides over the past few years because he's so focused every day.
"Olivier has big experience in the game now and has become a more and more complete player since joining us.
"Laurent is of course a key part of our squad and I believe one of the best defenders in the world today. So overall, this is great news for us."