Leno has been linked with the Gunners this week, where he has been mentioned as a successor for Petr Cech.
He told BILD: "I've said many times before that I would be attracted to work abroad. But I'm not really into that at the moment.
"Now I want to go back to the Champions League with Leverkusen."
Leno's deal carries a €25m buyout clause.
"Two years ago, there was this speculation before. At that time I was thinking too much about it myself. Constantly there were questions about this topic. Today, with two years more experience, I am much more relaxed," he added.