The 23-year old Welsh midfielder has extended his stay at the Emirates Stadium until 2019 after joining from Cardiff City for £5million in 2008.
"I'm delighted to have signed a new contract. I've been here for six years and I'm so happy. I think we've shown so far this season what we're all about and the direction that this club wants to go in," Ramsey said.
"I want to be a part of that, and to be a part of something special at Arsenal. We have a great team which we believe can achieve great things."
Since arriving in north London, Ramsey has appeared in close to 180 matches in all competitions for the Gunners, scoring 24 goals. He has netted 13 goals in 27 outings this season before succumbing to a thigh injury.
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