Antonio Conte’s side have agreed a £40m deal with the Gunners for the England international.
Arsene Wenger was keen to tie him down to a new contract, but Oxlade-Chamberlain rejected their £150,000-a-week deal.
He’s instead set to put pen to paper on a £220,000-a-week deal at Stamford Bridge.
Whether he’ll take someone's place in the first team and become a regular starter remains to be seen, but Chelsea are signing a very versatile player in Oxlade-Chamberlain.
The Gunners ace can deputise in a number of different positions if the Blues struggle with injuries or suspensions.
So where could he fit in?
Click through the gallery above to see five ways Chelsea could line up with Alex Oxlade-Chamberlain.
