The Costa Rica international has been handed his chance in the Gunners first team this season, with a series of injuries to key players pushing him up the pecking order.
He has impressed as well, with several quality performances, the latest coming in their FA Cup win over Sunderland on Saturday afternoon.
And now Wenger has likened his rise to the Arsenal first team to that of midfielder Francis Coquelin, who shot to prominence in a similar situation last season.
“He is kind of in Coquelin's position last year,” Wenger told Arsenal Player.
“Nobody expected him [to do well] and now he is taking his place in the team and he is ready to fight for the position and he is efficient.”
“I agree [that he is playing with confidence]. That comes out of his game. Compare one month ago to today, he believes he belongs there and has a right to play.”
The problem for Campbell moving forward will be that he is unlikely to remain in the first team picture once Wenger has his star men back fit.
He has been handed his current chance through the loss of the likes of Santi Cazorla and Coquelin, with usual right-winger Aaron Ramsey having to be deployed in central midfield in his absence.
When those players are back though, he is likely to find himself back down the pecking order though and may have to leave the Emirates if he is craving first team football in future.