Arsenal need four new players to help the squad go after the Premier League title.
The former Gunners star suggests there needs to be a little bit more competition within Arsene Wenger's squad of the north London club want to mount a serious title challenge next season.
"I'm talking about a spine - a goalkeeper, a centre-back, a holding midfielder and a striker," said Henry on Sky Sports.
"I'm not saying to the guys, 'leave and come and let them play', they need to compete."
Arsenal finished this season in third position, 12 points behind champions Chelsea.