Elano is City’s third signing in a matter of hours today and takes their spending to nearly £20million in 24 hours.
The 26-year-old has signed a four-year contract at Eastlands.
City chief executive Alistair Mackintosh said: “This morning has proved to be an immensely productive one, the outcome of which is the acquisition of three top quality players for Manchester City Football Club.
“This has been achieved as a result of some tremendous team work and I would like to praise everyone involved for their efforts.
“I would particularly like to thank Dr Thaksin, without whom today’s signings would not have been possible.”