The 21 year old who signed a new deal with us last term has passed his medical at Swansea.
Bartley was on loan at Rangers last season.He has had a number of loan spells with clubs like Sheffield United and Ibrox and is now set to join Swansea who maintained their place in the Premier League.
He revealed on Twitter
"Swansea offered me an opportunity and I'm extremely excited to start my career here - will always be thankful to Arsenal for my education.
"Was told my chances of game time this year would be limited, and as an ambitious young playerI wanted to play in the Premier League.
"Now I'm here I will give 100% for Swansea. Thank you everyone who has ...