Courtois signs long-term deal
The Belgium international has been installed as the London club's first-choice goalkeeper this season at the expense of Petr Cech.
Courtois spent the last three seasons on loan at Atletico Madrid, but sees his future at Chelsea after breaking into Jose Mourinho's first team.
He told the club's official website: "I'm very happy with this new deal, it's really nice to have signed this new contract for five years.
"My future was already sorted but it's nice to know I'm going to be here for another five years and now I can just concentrate on playing games."