The 23-year-old, whose previous deal was due to expire in 2015, has now established himself as the club's first-choice shot-stopper after briefly losing his place in the side last season.
Arsenal boss Arsene Wenger is delighted to have secured the Pole's long-term future and believes he will continue to play an important role for the club for the foreseeable future.
“We’re very pleased Wojciech has signed a new long-term contract,” the Frenchman told the club's official website. “I have always believed he is an extremely talented player, with excellent reflexes and good mental strength.
“He continues to grow and improve all the time too, so he has the potential to be even better. He can be an important part of Arsenal Football Club for many years to come.”
Szczesny is thrilled to have extended his stay at the Emirates Stadium, having already been at the club for seven years, and is now targeting trophies as the Gunners bid to end their eight-year trophy drought.
“I am very pleased to have signed a new contract," said the Polish keeper. “Arsenal is like my family and I’m so happy to be committing my long-term future here.
