The 32-year-old has signed a one year contract with the Blues, and said upon signing: "I am very happy to be here but also anxious because I want to get playing as soon as possible.
"It wasn't a hard decision. I saw the qualities Chelsea have, and I was very happy with Jose Mourinho before, so when the opportunity came, I was very happy to take it."
Although Jose Mourinho refused to comment on Eto'o 's possible signing earlier today, the club website confirmed the news.
The Cameroonian goal machine has excelled at the top flight football with consistent performances at Barcelona and Inter Milan. At Inter, Eto'o played under current Chelsea boss Jose Mourinho, and was pivotal in them clinching the European Championship.
The two time Champions League winner had been heavily linked with a move to Stamford Bridge, after Chelsea's hopes of signing Rooney did not come through.
In total Eto'o has 288 goals in 543 competitive appearances.
The signing will come as a relief to most Chelsea fans, after the Blues attacking forwards struggled to trouble the Manchester United back line in the recent domestic clash.
Eto'o is the all-time leading goalscorer in the Africa Cup of Nations, and as well as tasting success at both the 2000 and 2002 tournaments, he was part of the Cameroon team which won gold at the 2000 Olympics in Sydney.
He is a four-time winner of the African Player of the Year Award.
Eto'o is not a part of Chelsea's Super Cup squad to face Bayern Munich tomorrow, but Mourinho will be looking to select him when Chelsea play Everton in their next Premier League match.
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