The 31-year-old striker moves to Stamford Bridge from Italian side Juventus. He spent the first half of the campaign on loan at AC Milan where he scored eight goals.
A proven goalscorer throughout his career, and an Argentina international, Higuain arrives with a wealth of experience at the highest level having consistently shown his attacking quality during spells in Argentina, Spain and Italy.
Upon completing his loan move to Chelsea, Higuain, who will wear the number nine shirt, said: ‘When the opportunity to join Chelsea presented itself I had to take it. It’s a team I’ve always liked that has a lot of history, a wonderful stadium and they play in the Premier League, a league I’ve always wanted to play in.
‘I now hope I can give back that trust Chelsea have shown me out on the pitch. I can’t wait to start and I hope to adapt as soon as possible.