Mannone joined the Gunners in 2005. The 21-year-old made eight appearances and impressed for Arsenal earlier this season when Manuel Almunia and Lukasz Fabianski were out with injuries.
“It’s a great day for me, a great moment. I’m really happy to be staying at Arsenal and will give everything to repay the club for the faith they have shown in me,” he told the club’s official website.
“I have progressed a lot since coming here. I’ve been here for a lot of my growing life so yes, I have improved as a man and as a player.
“I’ve learned a lot from my experiences at Arsenal and am happy to have the chance to grow more and more.”
