
The 18-year-old has been a regular in the under-23 team managed by Steve Gatting for the past two seasons.
But the teenager, who is comfortable in defence and midfield, is yet to appear for the first-team.
Nevertheless, the Gunners have opted extend the previous contract which was signed in 2015.
Arsene Wenger's moment of madness during Arsenal v Burnley
Mon, January 23, 2017
Click through the gallery for the best snaps of Arsene Wenger's moment of touchline madness during Arsenal v Burnley
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Click through the gallery for the best snaps of Arsene Wenger's moment of touchline madness during Arsenal v Burnley
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Ben Sheaf is yet to play for the first-team
“Ben is a lovely player to manage,” Gatting told Arsenal Player.
“He has great character, he can use either foot and tonight played right back and has played central midfield, right midfield.
"Wherever he plays he does his best and again he scored and he has that quality around the box."
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