He was a very successful goalkeeper last time he was in the Bundesliga with Hertha Berlin and now goes back there to join Leverkusen as a back up goalkeeper.
On his return to Burnley his contract will be at an end. He signed a two year deal in the summer of 2007 with an option for a third but his lack of appearances this season mean that won't be taken up.
Director of Sport at Leverkusen Rudi Völler said: "Benedikt Fernandes has an injury and he will be out of action for some time. We need Erik Domaschke in the reserves so we wanted to have backup in case our number one René Adler gets sidelined. That's why we need an experienced keeper. I'm sure we've taken the right decision by bringing in Gábor Király."
In response the Burnley keeper said: "I would like to offer my support to the club and above all René Adler. While I was in England I always kept up to date with the Bundesliga and, in my opinion, René Adler is the natural successor to Oliver Kahn. He can do it and I'd like to help him achieve that target."