Sebastián González snapped the image as the Holy Father waved the crowds in Paraguay.
The Holy Father is often seen posing for photographs with faithful, but Mr González took to social networking site Twitter with his image which he tagged as the best selfie ever taken with the Pope.
The image is on its way to going viral with almost a thousand retweets in just a few days.
He's responded to the publicity of the image by tweeting: "I am twitstar? Oh no."
Best selfie Papal pic.twitter.com/qncqJbGY8U
— Sebastián González (@Sebayeah) July 11, 2015