The 33-year-old left-handed Frenchman, one of the most naturally gifted players on the tour, has won five singles titles in his career, including one on grass at Eastbourne in 2010.
Llodra's forte has been doubles, securing Australian Open titles alongside compatriot Fabrice Santoro in 2003 and 2004 and triumphing at
Wimbledon with Arnaud Clement in 2007. At the London Olympics in 2012, he and Jo-Wilfried Tsonga lost to American brothers Bob and Mike Bryan in the final.
"The 2014 season will be my last whatever happens," said Llodra, after a three-set defeat to Grigor Dimitrov at the BNP Paribas Masters in Paris.
"I have decided to go on for another year because I feel good physically and I still want to achieve more."
According to lequipe.fr, Llodra added: "I don't want to do one year too many but I feel I'm still capable of playing well and it would be a shame not to profit from that.
"This won't be a farewell tour like the Rolling Stones, this is a year where I'm going to give everything to play well."
Llodra peaked at number three in the doubles rankings and 21st in singles during the 2011 season, and has since fallen away to 24th in doubles and 50th for singles.