The 20-year-old joined Arsenal in January but spent one-year-and-a-half on loan in Spain.
“We’re delighted that Carlos Vela has signed a new long-term contract with the club,” Arsenal boss Arsene Wenger told the club’s official website. “Carlos is a fantastic talent and we have already seen glimpses of this during his performances.
“Let’s remember, he is still only 20 years old, so there is still a huge amount to come from this boy. We have invested a lot of time in Carlos, as we put him in Spain for two years to get some good experience.
“Now he’s back with us, we’re working hard with him every day and he is a very exciting player. We’re looking forward to seeing Carlos score many goals in an Arsenal shirt for a long time to come.”
