The England midfielder has been missing for more than a year after picking up a series of injuries that saw him miss all of last season, Euro 2012 and the Olympics.
The 20-year-old is now drawing closer to a return to first-team action, much to the delight of his manager and teammates.
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."
"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 while on loan at Wolves last season.
"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,” Wenger said.