Didier Drogba, John Terry, Ashley Cole, John Mikel Obi, Florent Malouda, Hilario and Michael Mancienne have also signed in agreeing new deals since the end of last season.
Ashley Cole to sign new Chelsea contractFlorent Malouda signs two-year contract extension with Chelsea"I am very pleased that Salomon has signed a new contract with us as he is an important player for this club," said coach Carlo Ancelotti.
"He is always well motivated and works hard at his game at all times. Because of this I am sure that Salomon will become an even more important player for Chelsea in the future."
Chelsea have appealed against FIFA's ruling but the Kalou deal represents another timely boost for the club should they fail to get the verdict overturned.
Kalou reached the World Cup finals with the Ivory Coast when they drew 1-1 with Malawi at the weekend, and club and country colleague Didier Drogba now wants his country to make history in South Africa next summer.
"It is going to be a challenge," said Drogba, who scored against Malawi. "To make it to the final will not be easy because there are great teams like Brazil and Germany who have won the World Cup for many years."