"I am very pleased Salomon has signed a new contract with us as he is an important player for this club," manager Carlo Ancelotti told the Premier League team's website on Monday.
Kalou, 24, joined Chelsea in 2006 from Dutch side Feyenoord and has scored 31 goals in more than 150 appearances for the London club.
Thank you for reading 5 articles this month* Join now for unlimited access
Enjoy your first month for just £1 / $1 / €1
*Read 5 free articles per month without a subscription
Join now for unlimited access
Try first month for just £1 / $1 / €1
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.