Chelsea have signed Emerson from Roma, The 23-year-old has signed a four-and-a-half-year contract and will wear the number 33 shirt.
The 23-year-old Brazilian – who switched his international allegiance to Italy – has been assigned the number 33 shirt at Chelsea.
He told Chelsea’s official website: “I came here because it’s a great team with a great history. Today I am realising one of my dreams to pull on the shirt of such a great club.
“English football is something I have been watching since I was 15 years old. It is a really beautiful game over here but it is going to be even more beautiful to play it.”
Palmieri began his career in his Brazil with Santos before joining Serie A side Palmero on loan in 2014 and Roma permanently the following season.
He is set to provide competition for Marcos Alonso in Conte’s squad following Baba Rahman’s loan move to Schalke.