In an interview two years since he was elected, the Holy Father said security restrictions had stopped him from moving about freely.
"The only thing I would like is to go out one day, without being recognised, and go to a pizzeria for a pizza," he told a Mexican television channel.
He missed his life as the Archbishop of Buenos Aires, he added.
"In Buenos Aires I was a rover. I moved between parishes and certainly this habit has changed. It has been hard work to change. But you get used to it."
When asked if he liked being the leader of the world's 1.2 billion Catholics he replied "I don't mind".