The England midfielder has been missing for over a year after picking up a series of injuries which saw him miss the entirety of last season, including Euro 2012 and the Olympics.
However, the 20-year-old is now drawing closer to a return to first-team action, much to the delight of his manager and team-mates.
Arsene Wenger told the club's official website: “We are so pleased that Jack is back in full training. It’s been 14 months and that’s a long time for someone at his age. It’s an eternity, but it’s great news.
"We have to give him a few training sessions to see how he copes and responds to it. That’s the delicate, sensitive stage - to choose when to bring him in and out. We’ll have to handle that day-by-day."
Wilshere's agent, Si Bayliff, said on Twitter: "Delighted to say that Jack Wilshere was back in full 1st team training today. Understandably he is a very excited young man today."
"I know what it means when you’ve been out for a long time. You can see how excited Jack is to get back in training and show how good a player he is.
"He’s going to bring something different to the squad - more quality to the team - and that can only be better for everyone."
Meanwhile, Wenger also revealed another long-term absentee, Emmanuel Frimpong, has also returned to training after damaging his cruciate ligament whilst on loan at Wolves last season.
He added: "We also have Emmanuel Frimpong who has returned to full training this week, which is great news as well. Emmanuel has also been out a long time, but is progressing well.”